Incomprehensible youtube anomalies, what to do with it 0-0?

Question

YouTube

I recently changed the firmware on the Lenovo p780 device from Alice 9.0 (raw and terrible) to MistycOS 5.0 from XDA. Both firmware versions are 4.4.2, but on one (Alice) Youtube works fine (as well as on all previous ones) and on the other (MysticOS) sometimes there are incomprehensible image anomalies (a black picture with large large video squares in different places and not quite squares, all the colors of the rainbow), and sometimes (almost always after the anomaly) it writes that a server error has occurred and asks you to click on the screen to play the video again :-\
What to do, where to go, where to drill? (I'm not going to change the firmware)
PS On other devices from the same account, all videos work fine.

Answer 1

Once again I "learned" to use Google;)
Through Titanium Backup, I untied youtube from GP and made it a system application. Everything is like clockwork.