Boats and boats with chest are very glitchy in bubble columns
Boats are going crazy when pushed up and they don't even get pulled down.
- Place a boat on water and get in.
- Drive in a water elevator out of magma blocks and soul sand blocks.
- Realise that it is very clunky and glitchy.
- Then realise that soul sand doesn't pull down the boat with you and doesn't even do anything than dancing really.
- Be very angry! >: (
Hope it helped. I'll link a glitched out shematic (because of MC-130733) which should give you an idea. Just use a structure block to place it.