Hello, I am not convinced that my ticket is a duplicate, the https://bugs.mojang.com/browse/MCPE-42310 speaks about different case.
I think this one is related: https://bugs.mojang.com/browse/MCPE-42866
I had this bug several times on Nintendo Switch, it started to happen after upgrade to 1.9.0. Restart of the game is fixing it. It does not need to be the ocean biome, it was happening with standard water as well. https://bugs.mojang.com/browse/MCPE-42916
Thank you, can you give more details please and explain how a broken rendering of underwater areas is duplicated by a piston texture issue?
Exactly, this 1.9 update is quite harmful for the game. I have reported one more issue yesterday - https://bugs.mojang.com/browse/MCPE-42866
MCPE-42866