(Quest 3 - UE 5.7.4) Black lines & artifacts when in APK build

Hi!

I am creating a VR game build for Quest 3 (Android standalone), using Unreal Engine 5.7.4 and the MetaXR plugin (version 1.205.0).

It works perfectly on PC, but the Android build for Quest 3 appears dark and shows artifacts: the game runs (sounds play and objects are partially visible, but dark), but the screen is filled with pixelated vertical black lines (jagged edges/aliasing) and artifacts. However, a text widget displays correctly.

AFAIK, I´m using all recomended settings for Quest 3 build. Made a dozen changes and test builds, always with the same result. 

Any hint?

Thanks in advance!!!