indestructable piston block

### WorldEdit Version

Fabric-Official(7.3.0+6678-5574ad)

### Platform Version

Fabric 0.15.17, 1.20.4

### Confirmations

- [X] I am using the most recent Minecraft release.
- [X] I am using a version of WorldEdit compatible with my Minecraft version.
- [X] I am using the latest or recommended version of my platform software.
- [X] I am NOT using a hybrid server, e.g. a server that combines Bukkit and Forge. Examples include Arclight, Mohist, and Cardboard.
- [X] I am NOT using a fork of WorldEdit, such as FastAsyncWorldEdit (FAWE) or AsyncWorldEdit (AWE)

### Bug Description

Don't know if this is a bug, but:
You can make indestructable ghost blocks from pistons.
Took a while to find out why my pistons aren't working after i deleted them.
https://i.imgur.com/3rmfEe9.mp4
here is a video of it happening

### Expected Behavior

when i delete the pistons and return them, they wouldn't become invisible unbreakable blocks

### Reproduction Steps

1. place a few pistons connected to a clock
2. delete them with something like /replacenear 5 air
3. do /undo
4. when you do that, some of the pistons become... unbreakable air blocks???

### Anything Else?

_No response_