Wish I could give more details, but the sheer amount of crash logs and failed attempts to work out an exact cause means I've got nothing concrete to show.

I brought my world forward from .19 to .23, and went through nearly two dozen crashes trying to fix what I at first assumed was an error with MineColonies, as it was pointing towards a colonist causing ticking errors. That turned out to not be the issue as teleporting away simply caused more crashes with the next nearest entity in the world, in this case a fly from Alex's Mobs.

Rolling back to .22 so far has yet to cause any issues of this magnitude, so I'm sticking with it for the time being. Maybe I did something wrong, but it's definitely a crippling problem if others end up running into it too.

A lot of bugs from that mod have been fixed. If you are still having issues on 0.2.31+ let me know.