Menu Navigation Buttons Ghost Touches

[LizzardKing]

Hi guys, I need your help.

Recently I've updated my Mi4c to Android 7 (7.6.15 MIUI)
After ~1 week of usage when I played comparably heavy CPU intensive game my navigation buttons on the bottom stopped working.
When I removed the screen firm, it went back to workable state, but navigation buttons started to press randomly (menu, home, back). After switching screen on and off everything is fine for ~10 seconds. Afterwards they are being pressed by themselves in random order.
I tried built-in touchscreen test - no ghost touches on actual screen. Everything is working fine for touchscreen itself. But navigation buttons are touched by "ghosts"

Did anyone faced same problem? Please, advice

 

[steka]

my phone is having the same issue. random buttons press. I changed a lot of roms and it is the same problem for all of them. I am afraid this might be a hardware problem. It is becoming more and more frustrating to me as my phone do this random stuff every single day plenty of times. I am going to buy a new phone. This is my first xiaomi phone and I am disappointed because I only had this phone for 9 months