This bug is basically MC-273338 and MC-135192 but in Bedrock Edition.
Steps to reproduce:
Find or create bubble columns, magma blocks for downward bubble columns, soul sand for upward bubble columns.
Place String above the surface of the water.
Place boat.
Expected result:
Boat enters capsizing animation, before either sinking (downward bubble column) or breaking and dropping as an item (upward bubble column)
Observed result:
Boat either sinks instantly (downward bubble column) or flies (upward bubble column):
Minecraft 2024-06-25 12-00-02.mp4
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To help in confirming your report, please add the following information to the Description, as shown here:
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But this is working correctly. Even with the player, the bubble column with soul sand will launch you upwards, while the magma column sucks you deeper and you start to take damage. This issue should be working properly

But this is working correctly. Even with the player, the bubble column with soul sand will launch you upwards, while the magma column sucks you deeper and you start to take damage. This issue should be working properly

You can use the flying boat bug to fly hack in survival if you time it right
@LookAnOldPerson

ohhh,

ohhh,

Confirmed.

I also with Boats with chest is affected. I could confirm.