This has been a bug that stands out like a sore thumb for quite some time now, and TF's devs haven't even tried fixing it since they added these to the mod.

Basically, the doors all have missing textures due to the mod not registering the item textures correctly, and you can't even use resource packs to fix this either.

Tested with and without other mods, same issue.

Outside of the scope of the addon, sorry

This is a tweaks mod, not sure why a fix isn't possible.