Video freezes on first frame

Hi there

I'm develop a simple player for 360 video in Unity 2019.4.3, using last version of AVPro plugin/exoplayer on Oculus Quest

And sometimes my files are freezing on first frame, sometimes not

Videos in H256 codec 5760x2880 35mbps 30 minutes long with main profile and audio in wav 9ch ambisonics + 2 stereo, then i muxing it in MKV container with Facebook 360 encoder

Downscaling video to 5120x2560 and 4096x2048 and changing codec to H264 not helps
In Oculus gallery this files works fine!

Logcat gives me some issues
Somebody knows what could be wrong?