Glitching doors

[HiggiMC]

When I lock any type of door using /lock /cpassword or anything like that, when you try to click the door, it glitches it out and you can like spam doors and abuse it to the point you can get stacks and stacks of doors. It would be great if this could get fixed. We are thinking that it locks the air around the door or something. Any reply to our problem would be very appreciated. We hope to get the ability of locking doors back soon :)
-HiggiMC