Apparently this lovely little “feature” has yet to be fixed, despite people complaining about it since day one, so here we are over one year later.
To people not familiar with this phenomenon, whenever the person who formed the party leaves said party while doing a dungoen/fractal, everyone gets kicked out and the run is ruined.
I’m posting this in the bug section, since the thought that someone considered this godawful design choice to be a good idea is horrifying.