If you use a puffer fish bucket in a 1-block hole, you will not be able to put blocks just above the water block (although the block will show for a moment and then it will disappear). This only happens with the puffer fish, with the rest of the fish it does allow to put blocks.
MCPE-128579
Can't place blocks over small water source with pufferfish
Resolved
Duplicate
0
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We're tracking this issue in MCPE-49606, so this ticket is being resolved and linked as a duplicate.
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