Hope add Roller Shutter door.
And this:

have some strange behavior. Maybe it maximum size is 2x2?

The maximum is 2 in width, the height can be up to 3. For me to do bigger than that, I would have to implement multiblocks but I will not do it now because it lacks some blocks that I want to implement before.

but if height is 3, model still strange
and if act with that lowest block, only 2 height door block will change status

I'll check, it should be a bug then