It's definitely one of good routes, though since it wasn't reported, it's probably more uncommon one.
But, I think I know what's going on, sounds like event is repeating itself due to transfer somewhere. I will take a look and figure out a way to fix it and there are at least two ways. Will drop a fix after checking out if it doesn't happen anywhere extra as transferring was added later to not have such long time for characters to move around. Though, rather after I get some sleep.
EDIT: So I took a look into event itself and honestly, have no clue "why" it's happening. If you can, send me save(s) of the game so I can take a deeper look into it
@Soylent Green