Expedition spawned outside regualr map area

Clip:
https://youtu.be/gBoxVSAHWP8

Expedition spawned in area that is not connected to the rest of the map.
Walked around looking for a hidden switch or door that might grant access with no luck - plus that's not a mechanic i would expect - disconnected areas in PoE maps alreays had red door icons, secrets like that have only been in campaign (or old labs)