[BUG] Ships sink when all blocks remove, but not when only concrete is removed

[Solesey]

Describe the bug
When concrete is removed from an unpiloted ship via worldedit, it stays flying, but when all blocks are used with //cut, the ship sinks. This is not related to the jukebox being destroyed, as it applies no matter what part of the ship is affected.

To Reproduce
Get a ship and make a selection around one specific shield with worldedit. First, use //replace [concrete name] air. This should not destroy the ship, at least according to my testing. Then, undo that edit and use //cut on the same region. This should cause the ship to sink or explode.

Expected behavior
If my knowledge is correct, removing exclusively concrete should be more destructive than //cut, as the ship exclusively loses concrete, but not any armor. The ship sinking when using //cut makes sense, but it's odd that it does not sink when only concrete is lost

Screenshots



Ship with only concrete removed on left, cut ship on right. Both are unpiloted.

System (please complete the following information):

• OS: Windows
• RAM: 16.0 GB
• Minecraft Version: Minecraft Java Edition 1.16.5

Additional context
This may be a result of my specific ship designs, as I have not tested with other designs. Regardless it seems odd.

[hafarooki]

what is the concrete %

[Solesey]

The concrete percent is pretty low on the ship, but I believe I've found my misconception. Unbeknownst to me before, ships sink not when concrete is lost, but when a portion of the hull is lost. This disproves my report.