New K20 pro always find device closed unexpectedly

[KasuganoSoras]

Hello, recently I always found out that my device is ridiculously restarted. After rebooting, the phone prompts find device closed unexpectedly

 

[czacha994]

Same, from time to time (like every 1 or 2 days) my 9T pro is doing the same thing. Always restarted when I tried to unlock it.
I enabled some system apps that I disabled (family guard etc) because i read on xda that it might be the cause.