@mediamogul

Sorry for the missed info. Here it goes:

Raspberry Pi 3 B, V2 Power supply 5V 2.5A Games: Tetris on Atari2600 , Tetris on Sega32 RetroPie built from SD image, RetroPie version is 4.3 No overclock USB devices: wifi antenna, 4 axis joystick, infra-red keyboard+mouse receiver

FYI I have same problem but in RetroArch that recently gained atari800 support, different platform - NVIDIA Shield TV (Android). I have decided to file a bug report at: https://github.com/atari800/atari800/issues/13

https://retropie.org.uk/forum/topic/3/read-this-first

That did the trick. Thanks!

Thank you!