Villagers and vindicators can open copper doors as if they were wooden doors.

How to reproduce:

• Use the 1.21 experimental pack
• Make an enclosed space with only one exit
• Place a copper door closing that exit
• Spawn a villager inside the enclosed space

The villager will open and close the door without any issue at all.

Expected behavior:

The villager should not be able to open the copper door, as they should only be able to open wooden doors.

Sidenote: this would even be useful as copper doors would be the first door that can be opened by players but not by villagers.