While in the infinite dungeon, it's possible to get portals to special dungeons (Ex: Poosh, in this particular instance). I entered Poosh, and then died, whereupon I was given the option to go somewhere else form the Eidolon.
After doing so, I was returned to the main campaign overworld map, rather than the infinite dungeon, and was able to (it appears) play as normal. I expect most triggers would be broken however(?) if any are quest based.