Version Info

• Minecraft, 1.20.1
• Moving Elevators, 1.4.7

Are you using OptiFine?: No

Description of the Bug
Using the More Decoration modpack, after moving an elevator, all of the air in it turns into waterlogged blocks. It was waterlogged iron ender chests from Wider Ender Chests, but I removed that mod and it was fixed, but then I added Sliding Doors and now it's waterlogged sliding doors.

Steps to Reproduce

1. Install the More Decorations modpack by Lupin
2. Add Sliding Doors by Alexander8VKHZ
3. Create an elevator
4. Move the elevator between floors

Screenshots

Same on 1.21 and wider enderchest mod

@carloanselmini what modloader are you using?

This seems to have been caused by Wider Ender Chests registering their blocks in a non-ideal way, causing the vanilla block ids to be shifted to after Wider Ender Chests blocks. This meant the block at id 0 became a block from Wider Ender Chests rather then the vanilla air block.
This should now be fixed in Moving Elevators version 1.0.8 and I have also reported the issue to Wider Ender Chests.
Thank you for reporting the issue!