mi 9t / redmi k20

I cannot cast my screen but casting youtube app and controlling it through google home is working. How to fix it?

Good day! I installed different software versions on Android 11 (12.1.2 - 12.5.2). Everywhere recurring problems that were not in versions on Android 10: 1. Freezes the interface 2. Aggressive closing of applications in the background 3. Very long application launch (for example, Chrome starts...