Hive Colony "expired because it is no longer the most recent child instance for this area."

Did I really lose my Tul/Esh attempt because I misclicked a Vaal side area while clearing my map?

Either way this should not be a thing. Going to a different subzone of a map should not instantly despawn the other.

Alternate bandaid solution: don't allow multiple sub-instances, old school style. If a zone has a Hive Colony instance, block spawning a Vaal side area instance.