Help! App crashes on 924860.20080.0 (v21), but runs on 1201840.7600.0 (v23)

[Peristeronic]

The App worked flawlessly on all devices before the update of Oculus Integration + Oculus XR Plugin.
I updated the Integration Asset to 20.1 and Oculus XR Plugin to 1.6.1 and now the app only runs on devices with OS Version 1201840.7600.0 (v23) and instantly crashes when selecting the app on 924860.20080.0 (v21).

I can see "VrApiLoader: vrapi_Initialize: Failed to load VrApi driver! Java Exception" right before the app crashes (ActivityManager: Process com.Company.AppName (pid 5184) has died: fore TOP). This does not happen on 1201840.7600.0.

Any idea how to fix this? It kind of seems like the newest Oculus Integration + XR Plugin is not backwards compatible? There seems to be different targetSDKVersion on both devices as well (27 vs 28). 
I also tried changing from ARM64 to ARMv7, but output is exactly the same.

Here is the log when crashing (on 924860.20080.0)

12-16 13:19:22.028  5184  5205 I Unity   : SystemInfo CPU = ARM64 FP ASIMD AES, Cores = 3, Memory = 5757mb
12-16 13:19:22.028  5184  5205 I Unity   : SystemInfo ARM big.LITTLE configuration: 3 big (mask: 0x70), 0 little (mask: 0x0)
12-16 13:19:22.028  5184  5205 I Unity   : XR UsableCoreMask: 0x70
12-16 13:19:22.028  5184  5205 I Unity   : ApplicationInfo com.Company.AppName version 0.1.8 build 091b26ff-290a-4efb-bee0-42d7e2367680
12-16 13:19:22.028  5184  5205 I Unity   : Built from '2019.4/staging' branch, Version '2019.4.16f1 (e05b6e02d63e)', Build type 'Release', Scripting Backend 'il2cpp', CPU 'armeabi-v7a', Stripping 'Enabled'
12-16 13:19:22.083  5184  5205 E Unity   : Unable to find libAudioPluginOculusSpatializer
12-16 13:19:22.087  5184  5205 D Unity   : loading library OVRPlugin
12-16 13:19:22.104  5184  5205 D Unity   :  GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_half_float GL_OES_framebuffer_object GL_OES_rgb8_rgba8 GL_OES_compressed_ETC1_RGB8_texture GL_AMD_compressed_ATC_texture GL_KHR_texture_compression_astc_ldr GL_KHR_texture_compression_astc_hdr GL_OES_texture_compression_astc GL_OES_texture_npot GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_OES_texture_3D GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_QCOM_alpha_test GL_OES_depth24 GL_OES_packed_depth_stencil GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_EXT_sRGB GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_EXT_texture_type_2_10_10_10_REV GL_EXT_texture_sRGB_decode GL_EXT_texture_format_sRGB_override GL_OES_element_index_uint GL_EXT_copy_image GL_EXT_geometry_shader GL_EXT_tessellation_shader GL_OES_texture_stencil8 GL_EXT_shader_io_blocks GL_OES_shader_image_atomic GL_OES_sample_variables GL_EXT_texture_b
12-16 13:19:22.104  5184  5205 D Unity   : order_clamp GL_EXT_EGL_image_external_wrap_modes GL_EXT_multisampled_render_to_texture GL_EXT_multisampled_render_to_texture2 GL_OES_shader_multisample_interpolation GL_EXT_texture_cube_map_array GL_EXT_draw_buffers_indexed GL_EXT_gpu_shader5 GL_EXT_robustness GL_EXT_texture_buffer GL_EXT_shader_framebuffer_fetch GL_ARM_shader_framebuffer_fetch_depth_stencil GL_OES_texture_storage_multisample_2d_array GL_OES_sample_shading GL_OES_get_program_binary GL_EXT_debug_label GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent GL_QCOM_tiled_rendering GL_ANDROID_extension_pack_es31a GL_EXT_primitive_bounding_box GL_OES_standard_derivatives GL_OES_vertex_array_object GL_EXT_disjoint_timer_query GL_KHR_debug GL_EXT_YUV_target GL_EXT_sRGB_write_control GL_EXT_texture_norm16 GL_EXT_discard_framebuffer GL_OES_surfaceless_context GL_OVR_multiview GL_OVR_multiview2 GL_EXT_texture_sRGB_R8 GL_KHR_no_error GL_EXT_debug_marker GL_OES_EGL_image_external_essl3 GL_OVR_multiview_multisampled_render_to_texture GL_E
12-16 13:19:22.104  5184  5205 D Unity   : XT_buffer_storage GL_EXT_external_buffer GL_EXT_blit_framebuffer_params GL_EXT_clip_cull_distance GL_EXT_protected_textures GL_EXT_shader_non_constant_global_initializers GL_QCOM_texture_foveated GL_QCOM_texture_foveated_subsampled_layout GL_QCOM_shader_framebuffer_fetch_noncoherent GL_QCOM_shader_framebuffer_fetch_rate GL_EXT_memory_object GL_EXT_memory_object_fd GL_EXT_EGL_image_array GL_NV_shader_noperspective_interpolation GL_KHR_robust_buffer_access_behavior GL_EXT_EGL_image_storage GL_EXT_blend_func_extended GL_EXT_clip_control GL_OES_texture_view GL_EXT_fragment_invocation_density GL_QCOM_motion_estimation GL_QCOM_validate_shader_binary GL_QCOM_YUV_texture_gather
12-16 13:19:22.400  5184  5205 I Unity   : XRGeneral Settings awakening...
12-16 13:19:22.400  5184  5205 I Unity   : UnityEngine.Logger:Log(LogType, Object)
12-16 13:19:22.400  5184  5205 I Unity   : UnityEngine.XR.Management.XRGeneralSettings:Awake()
12-16 13:19:22.400  5184  5205 I Unity   :
12-16 13:19:22.400  5184  5205 I Unity   : (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
12-16 13:19:22.400  5184  5205 I Unity   :
12-16 13:19:22.403  5184  5205 I VrApiLoader: VrApi Loader Version: 1.1.40.0-0-0 Nov 19 2020 10:21:27
12-16 13:19:22.417  5184  5205 W VrApiLoader: vrapi_Initialize: Failed to load VrApi driver! Java Exception
12-16 13:19:22.439  1048  2031 I ActivityManager: Process com.Company.AppName (pid 5184) has died: fore TOP
12-16 13:19:22.457  1048  1070 W ActivityManager: setHasOverlayUi called on unknown pid: 5184
12-16 13:19:22.584  4545  5107 I VrApi   : FPS=72,Prd=50ms,Tear=0,Early=72,Stale=0,VSnc=1,Lat=1,Fov=0,CPU4/GPU=4/3,2419/490MHz,OC=FF,TA=0/70/0,SP=N/N/N,Mem=2092MHz,Free=3430MB,PSM=0,PLS=0,Temp=35.2C/0.0C,TW=2.81ms,App=3.94ms,GD=0.00ms,CPU&GPU=6.01ms,LCnt=4,GPU%=0.40,CPU%=0.08(W0.14),DSF=1.00
12-16 13:19:22.898  4545  4571 W VrApi   : ovr_SubmitFrameInternal: FrameIndex discontinuity: Expected 67831, Received 67830
12-16 13:19:22.898  4545  4571 I VrApi   : ---------- vrapi_LeaveVrMode [start] ----------
12-16 13:19:22.899  4545  4571 D VrApi   : targetSDKVersion 27
12-16 13:19:22.902  4545  5107 I VrApi   : FPS=72,Prd=50ms,Tear=0,Early=72,Stale=0,VSnc=1,Lat=1,Fov=0,CPU4/GPU=3/3,2419/490MHz,OC=FF,TA=0/70/0,SP=N/N/N,Mem=2092MHz,Free=3430MB,PSM=0,PLS=0,Temp=35.2C/0.0C,TW=2.81ms,App=4.06ms,GD=0.00ms,CPU&GPU=6.01ms,LCnt=4,GPU%=0.44,CPU%=0.07(W0.11),DSF=1.00
12-16 13:19:22.903  4545  4571 I VrApi   : OVR::Stats thread stopped
12-16 13:19:22.927  4545  4571 I VrApi   : ---------- vrapi_LeaveVrMode [end] ----------
12-16 13:19:22.951  4545  4571 I VrApi   : ---------- vrapi_EnterVrMode [start] ----------
12-16 13:19:22.953  4545  4571 D VrApi   : targetSDKVersion 27
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_RESET_WINDOW_FULLSCREEN = 1
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_NATIVE_WINDOW = 1
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_FRONT_BUFFER_PROTECTED = 0
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_FRONT_BUFFER_SRGB = 1
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_CREATE_CONTEXT_NO_ERROR = 0
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_PHASE_SYNC = 0
12-16 13:19:22.963  4545  4571 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_APP_SPACE_WARP = 0
12-16 13:19:22.963  4545  4571 I VrApi   : PhaseSync disabled
12-16 13:19:22.963  4545  4571 I VrApi   : HMD sensor attached.
12-16 13:19:22.978  4545  4571 I VrApi   : OVR::Stats thread started
12-16 13:19:22.978  4545  4571 I VrApi   : ---------- vrapi_EnterVrMode [end] ----------
12-16 13:19:22.981  4545  5244 D VrApi   : targetSDKVersion 27
12-16 13:19:23.927  4545  4571 I VrApi   : ovr_HandleHmdEvents: HMT was UNmounted

And here is the running Version (on 1201840.7600.0)

12-16 13:34:47.874 20091 20112 I Unity   : SystemInfo CPU = ARM64 FP ASIMD AES, Cores = 3, Memory = 5838mb
12-16 13:34:47.874 20091 20112 I Unity   : SystemInfo ARM big.LITTLE configuration: 3 big (mask: 0x70), 0 little (mask: 0x0)
12-16 13:34:47.874 20091 20112 I Unity   : XR UsableCoreMask: 0x70
12-16 13:34:47.875 20091 20112 I Unity   : ApplicationInfo com.Company.AppName version 0.1.8 build 091b26ff-290a-4efb-bee0-42d7e2367680
12-16 13:34:47.875 20091 20112 I Unity   : Built from '2019.4/staging' branch, Version '2019.4.16f1 (e05b6e02d63e)', Build type 'Release', Scripting Backend 'il2cpp', CPU 'armeabi-v7a', Stripping 'Enabled'
12-16 13:34:47.943 20091 20112 E Unity   : Unable to find libAudioPluginOculusSpatializer
12-16 13:34:47.948 20091 20112 D Unity   : loading library OVRPlugin
12-16 13:34:47.972 20091 20112 D Unity   :  GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_half_float GL_OES_framebuffer_object GL_OES_rgb8_rgba8 GL_OES_compressed_ETC1_RGB8_texture GL_AMD_compressed_ATC_texture GL_KHR_texture_compression_astc_ldr GL_KHR_texture_compression_astc_hdr GL_OES_texture_compression_astc GL_OES_texture_npot GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_OES_texture_3D GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_QCOM_alpha_test GL_OES_depth24 GL_OES_packed_depth_stencil GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_EXT_sRGB GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_EXT_texture_type_2_10_10_10_REV GL_EXT_texture_sRGB_decode GL_EXT_texture_format_sRGB_override GL_OES_element_index_uint GL_EXT_copy_image GL_EXT_geometry_shader GL_EXT_tessellation_shader GL_OES_texture_stencil8 GL_EXT_shader_io_blocks GL_OES_shader_image_atomic GL_OES_sample_variables GL_EXT_texture_b
12-16 13:34:47.972 20091 20112 D Unity   : order_clamp GL_EXT_EGL_image_external_wrap_modes GL_EXT_multisampled_render_to_texture GL_EXT_multisampled_render_to_texture2 GL_OES_shader_multisample_interpolation GL_EXT_texture_cube_map_array GL_EXT_draw_buffers_indexed GL_EXT_gpu_shader5 GL_EXT_robustness GL_EXT_texture_buffer GL_EXT_shader_framebuffer_fetch GL_ARM_shader_framebuffer_fetch_depth_stencil GL_OES_texture_storage_multisample_2d_array GL_OES_sample_shading GL_OES_get_program_binary GL_EXT_debug_label GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent GL_QCOM_tiled_rendering GL_ANDROID_extension_pack_es31a GL_EXT_primitive_bounding_box GL_OES_standard_derivatives GL_OES_vertex_array_object GL_EXT_disjoint_timer_query GL_KHR_debug GL_EXT_YUV_target GL_EXT_sRGB_write_control GL_EXT_texture_norm16 GL_EXT_discard_framebuffer GL_OES_surfaceless_context GL_OVR_multiview GL_OVR_multiview2 GL_EXT_texture_sRGB_R8 GL_KHR_no_error GL_EXT_debug_marker GL_OES_EGL_image_external_essl3 GL_OVR_multiview_multisampled_render_to_texture GL_E
12-16 13:34:47.972 20091 20112 D Unity   : XT_buffer_storage GL_EXT_external_buffer GL_EXT_blit_framebuffer_params GL_EXT_clip_cull_distance GL_EXT_protected_textures GL_EXT_shader_non_constant_global_initializers GL_QCOM_texture_foveated GL_QCOM_texture_foveated_subsampled_layout GL_QCOM_shader_framebuffer_fetch_noncoherent GL_QCOM_shader_framebuffer_fetch_rate GL_EXT_memory_object GL_EXT_memory_object_fd GL_EXT_EGL_image_array GL_NV_shader_noperspective_interpolation GL_KHR_robust_buffer_access_behavior GL_EXT_EGL_image_storage GL_EXT_blend_func_extended GL_EXT_clip_control GL_OES_texture_view GL_EXT_fragment_invocation_density GL_QCOM_motion_estimation GL_QCOM_validate_shader_binary GL_QCOM_YUV_texture_gather
12-16 13:34:48.325 20091 20112 I Unity   : XRGeneral Settings awakening...
12-16 13:34:48.325 20091 20112 I Unity   : UnityEngine.Logger:Log(LogType, Object)
12-16 13:34:48.325 20091 20112 I Unity   : UnityEngine.XR.Management.XRGeneralSettings:Awake()
12-16 13:34:48.325 20091 20112 I Unity   :
12-16 13:34:48.325 20091 20112 I Unity   : (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
12-16 13:34:48.325 20091 20112 I Unity   :
12-16 13:34:48.329 20091 20112 I VrApiLoader: VrApi Loader Version: 1.1.40.0-0-0 Nov 19 2020 10:21:27
12-16 13:34:48.345 20091 20112 I VrApi   : ----------- vrapi_Initialize [start] ----------
12-16 13:34:48.370 20091 20112 I VrApi   : Client type: 0 flags: 0x0 placement: 0
12-16 13:34:48.375 20091 20112 D VrApi   : isActivityFocusAware context = com.unity3d.player.UnityPlayerActivity@98d6c89
12-16 13:34:48.376 20091 20112 I VrApi   : isActivityFocusAware = 1
12-16 13:34:48.419 20091 20112 I VrApi   : vrapi_Initialize: Connected to VrRuntimeService after 0.007967s
12-16 13:34:48.437 20091 20112 I VrApi   : ----------- vrapi_Initialize [end] ----------
12-16 13:34:48.437 20091 20112 I VrApi   : ------------ vrapi_Shutdown [start] -----------
12-16 13:34:48.708 19241 20075 I VrApi   : FPS=91/90,Prd=12ms,Tear=0,Early=0,Stale=2,VSnc=1,Lat=-1,Fov=0,CPU4/GPU=3/3,1171/490MHz,OC=FF,TA=0/3/0,SP=N/N/N,Mem=1353MHz,Free=3367MB,PSM=0,PLS=0,Temp=30.2C/0.0C,TW=3.35ms,App=5.17ms,GD=0.00ms,CPU&GPU=8.08ms,LCnt=4,GPU%=0.54,CPU%=0.08(W0.19),DSF=1.00
12-16 13:34:48.740 19241 19272 I VrApi   : ---------- vrapi_LeaveVrMode [start] ----------
12-16 13:34:48.741 19241 19272 D VrApi   : targetSDKVersion 27
12-16 13:34:48.747 19241 20075 I VrApi   : FPS=91/90,Prd=12ms,Tear=0,Early=0,Stale=2,VSnc=1,Lat=-1,Fov=0,CPU4/GPU=3/3,1171/490MHz,OC=FF,TA=0/3/0,SP=N/N/N,Mem=1353MHz,Free=3367MB,PSM=0,PLS=0,Temp=30.2C/0.0C,TW=3.35ms,App=5.17ms,GD=0.00ms,CPU&GPU=8.08ms,LCnt=4,GPU%=0.54,CPU%=0.08(W0.19),DSF=1.00
12-16 13:34:48.748 19241 19272 I VrApi   : OVR::Stats thread stopped
12-16 13:34:48.791 19241 19272 I VrApi   : ---------- vrapi_LeaveVrMode [end] ----------
12-16 13:34:48.905 20091 20112 I VrApi   : ------------ vrapi_Shutdown [end] -----------
12-16 13:34:48.919 20091 20112 I VrApiLoader: VrApi Loader Version: 1.1.40.0-0-0 Nov 19 2020 10:21:27
12-16 13:34:48.920 20091 20112 I VrApi   : ----------- vrapi_Initialize [start] ----------
12-16 13:34:48.920 20091 20112 I VrApi   : Client type: 0 flags: 0x0 placement: 0
12-16 13:34:48.922 20091 20112 D VrApi   : isActivityFocusAware context = com.unity3d.player.UnityPlayerActivity@98d6c89
12-16 13:34:48.923 20091 20112 I VrApi   : isActivityFocusAware = 1
12-16 13:34:48.953 20091 20112 I VrApi   : vrapi_Initialize: Connected to VrRuntimeService after 0.005978s
12-16 13:34:48.965 20091 20112 I VrApi   : ----------- vrapi_Initialize [end] ----------
12-16 13:34:48.976 20091 20112 W VrApi   : vrapi_LocateTrackingSpace: ovr == NULL
12-16 13:34:48.992 20091 20112 D Unity   : initOculus Java!
12-16 13:34:48.992 20091 20091 D Unity   : Oculus UI thread done.
12-16 13:34:49.020 20091 20136 W VrApi   : IsOvrValid: ovr == nullptr. Package: com.Company.AppName
12-16 13:34:49.020 20091 20136 W VrApi   : vrapi_GetPredictedTracking2: ovr is invalid
12-16 13:34:49.514 20091 20136 I VrApi   : ---------- vrapi_EnterVrMode [start] ----------
12-16 13:34:49.516 20091 20136 D VrApi   : targetSDKVersion 28
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_RESET_WINDOW_FULLSCREEN = 1
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_NATIVE_WINDOW = 1
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_FRONT_BUFFER_PROTECTED = 0
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_FRONT_BUFFER_SRGB = 1
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_CREATE_CONTEXT_NO_ERROR = 1
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_PHASE_SYNC = 0
12-16 13:34:49.532 20091 20136 I VrApi   : ovrModeParms::VRAPI_MODE_FLAG_APP_SPACE_WARP = 0
12-16 13:34:49.532 20091 20136 I VrApi   : PhaseSync disabled
12-16 13:34:49.532 20091 20136 I VrApi   : HMD sensor attached.
12-16 13:34:49.540 20091 20136 I VrApi   : OVR::Stats thread started
12-16 13:34:49.540 20091 20136 I VrApi   : ---------- vrapi_EnterVrMode [end] ----------
12-16 13:34:49.542 20091 20165 D VrApi   : VrApi::isWifiConnected exception: Make sure android.permission.ACCESS_NETWORK_STATE is set in the manifest.
12-16 13:34:49.544 20091 20165 D VrApi   : targetSDKVersion 28

Can somebody please help? Do I really have to downgrade everything again?