Door Jam

This mod makes the new copper doors and trapdoors for 1.21 have a chance of not opening when clicked, to make them more unique from wooden doors.

Redstone powering is unaffected. Waxed doors and trapdoors 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.