planet life question

This is a fun game. I'm wondering, though, if anyone has a situation where it just randomly pops out of the dungeon, particularly the 99-level ones. Twice now I've been down deep in a dungeon and it suddenly disappeared, leaving me with what I suppose is an introductory screen that had only a clickable continue link, but instead of me ending back up in the dungeon where I was, I'd been booted from the dungeon and had to start back down again. I'm playing on an IPhone 6S with IOS 14. Currently in the space broccoli chapter.