When I testing apps  I watch  how work app on emulators. If I want to solve the problem in the video above (The palm gesture after which the screen is off, but the app is running and don’t stop, for example music), then i must have  some orientating marks.

  I took two  emulators ( one 2.3.0 r 2 and other 2.4.r6) and both are 360X480.
 I have found that the same app with the same settings, etc. on a single emulator stops(pause, music stop) when the screen is off, and  on the other emulator the app continues to work ( play music, don’t set on pause).
The following video demonstrates this.

https://youtu.be/uKx80bl7TmA

  That’s why I said in the post above: something has changed in the operating system?

How do I be oriented in this   issue?

Logs:

emul_0521

emul_0329