@Riko Are you talking about x86 android, because, this issue isnt present on 32 bit and 64 bit android devices, I tested it on devices running android 7 and above, also, I'm talking about mobile devices/tablet devices running android, not the x86 version or an emulator on x86, also this is an x86 only bug,since using the minecraft bedrock linux launcher on my raspberry pi 3B+ running both 32 and 64 bit OS, I dont get this issue... (I'm not saying all I say is correct, but, I just wanted to get a clarity, and sorry for the unnecessarily long comment 😞 )
I have already opened an issue regarding this...
https://bugs.mojang.com/projects/MCPE/issues/MCPE-129400?filter=allopenissues
Edit: include that this happens when the caves and Cliffs' toggle is enabled