Sorry for the inconvenience!
Did your Quest update to v59? If the issue happened after you played a specific video, we hope you can share with us the specific video. It would be better if you could share with us the INFO level logs.
You just need to go to SKYBOX's Global Settings, change the Logging Levels to "INFO", reproduce the issue, then click the BUG icon in the upper-right corner of Global Settings, and send us a bug report attached with logs(tick the "upload logs" box).
Besides, restarting your Quest may help when this issue occurs.