Lock/unlock door-command treated as building task?

Yesterday i had that issue where my miner started learning door/lock-building although he was not assigned to building at all, and he was even mad at the ruler for assigning him to building (send you the save on discord).
Today i recognized that the unlock/lock-command seems to be treated as building task - they even get the little hammer at their picture when they do that, but its not limited to people that are assigned to building - might all of that be connected maybe? (i had an active "add lock"-task when that yesterday happened, no lock/unlock-command though)

Sorry, hope you remember the context and all of this makes somewhat sense, if not just hit me up :D