I explored this trail Chamber in Survival, and in one room it was flooded. not really playable.
On the top there where Waterlogged waxed_cut_copper_slab. I think this room generated inside of a Watercave.
Reproduce:
Look at the Screenshot, there are Seed and coordinates.
make sure to generate this in 24w13a I just updated it to the newest version today.
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And additionally, all of the trapdoors and also the waxed copper grate are waterlogged. (screenshot) probably all blocks, that are waterloggable are waterlogged where the watercave should be.