The 2nd of July I played Minecraft and it worked just fine. My Android (Huawei p10 lite) had no issues whatsoever, except for something minor and really annoying. I tried to launch the game but to no avail. I've uninstalled and re-installed the game. Also I've restarted my phone. Nothing seems to work.
The other issue (I can't add any screenshots because my game won't launch) is the crouching when you're in water. For some reason, if you crouch, you can't uncrouch when you are in water. You cannot jump out of the water too.
I hope this helped.
The launching issue has already been reported here: MCPE-35078
The other issue you mentioned has already been reported here: MCPE-32478
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