Got it. Yeah, 10 metres not enough. Thanks, I will fix it later.
Thanks for the fix! Now everything works properly as they should and I can solve it easily in minutes.
Funny 
Because I did nothing.
Huh? I thought the distance thing was already fixed though, since apparently the doors are opening correctly this time, and isPathClear is working fine too. Hmm…
Nope. You can easily check version history for any level. I suppose you fixed your code with the given early data (about the center of rooms).