In the last betas of 1.20.20 and recent 1.20.30 I have seen that on mobile devices so far there is a small stoppage of 10 seconds that causes the game to stop and the FPS drop to 2 or 5. But the error consists in which the game stops for 10 seconds and this happens when mining, fighting, opening a chest or inventory making it very annoying to play since it stops at a random moment

MCPE-174482 

MCPE-174448