Area instance resets within a second of leaving it (not after 8-15 min)

Hi

I've experienced 2 insta-resets of area instances so far, both in act3, normal and cruel.

When entering Ziggurat Encampment for the first time from Sandswept Marsh, the marsh is reset right away and I cant go back to explore the remaining part of the map if I missed 1 objective, e.g. the Hanging Tree. There is no 8min timer this time. In fact, when I enter the Encampment and ctrl-click on the marsh, it shows no instance active, only the option to create a new instance.

Similar when entering the Azak Bog for the first time from Infested Barrens, the barrens is reset right away, shows no instance active.

On subsequent visits the instance behaves normally, only the first time around it vanishes. Seems to be quest-tied.

Might affect other areas but these ones are the ones I positively tested.

BR

/edit: using Steam client on Asus RoG laptop with Win 11, DX12, GF RTX