Great to see you're working on this, and using an automated test to help find issues more quickly is a good idea. Should hopefully be resolved in no time in that case :)
I tested one of my saves on both 0.2.9 and 0.2.10 and the same area was broken both times, even when approaching the problem area from further away, but I guess it hadn't been fixed by then. Awaiting 0.2.11!