Door Jam

This mod makes copper doors, trapdoors, and chests have a chance of not opening when clicked, to make them more unique from wooden doors & trapdoors.

Redstone powering and waxed blocks are unaffected.

Oxidization	Jam chance
None	0%
Exposed	25%
Weathered	50%
Oxidized	100%

It works server-side only, but doors appear to flicker. This effect can be avoided by installing on the client as well.