just encountered a floor with no stairs anywhere! this seems to be exceedingly rare, but very frustrating!
oh yea, thats a quirk of the way the HP bars update. The armors increase you max life, but not your current, so the hp bar automatically shifts down cause the new % is technically less despite being the same hp. That will def addressed in a future update. Sometimes very rarely the stairs can spawn behind a place where the top of the wall overlaps the walkable area so its hard to see (which is still a problem), I will try to look into if there is a case where they could fail to spawn though.