Temple just nuked itself for no reason

Just ran a temple (not a crazy one dropping a million divines) and after completing it, without doing architect, this is the result. https://imgur.com/a/RxGbg69.

It destroyed 6 out of the 7 rooms where the horseshoe of empty rooms is now (only one space was empty before), leaving the upper area totally inaccessible. It also deleted a commander's chamber in between the two guards rooms where you can see what used to be a continuous path. And it also deleted the room after the architect, but not the one that was at the end of the track, so now there's an armory sitting by itself with absolutely nothing near it.

What the hell is this crap? It's bad enough that the rules for destabilization don't seem to be explained anywhere, but how can something like this even happen? Hell even if it hadn't nuked half of my connections, it still destabilized about 10 rooms in total without me even setting foot in the architect room.