When there's a magma block and you swim by the magma using the boat it drags the boat down, but the problem is once you break the magma blocks it doesn't float back up. This shouldn't happen as a boat can float up if not too deep down.

How to reproduce

Start by crafting a boat and obtaining magma blocks
Once you have these items place the magma block underwater
Then move by the magma using the boat and the boat will sink
Then break the magma blocks and nothing happens to the boat, it should at least move or float back up after breaking the magma blocks that caused this to happen.