Disconnecting during mapping/temples/campaign.

Instances seem to disconnect me, sometimes I can enter a map, then a temple room and then it blocks me at the temple entrance and returns me to login screen repeatedly.
Can also happen at any other instance change step, either going into a map, loading a new area from within a map, entering a temple room or anywhere in campaign.
Happens more while in a party and an instance reset seems to fix it.
Australia based but have tried connecting via other servers and it persists.
Currently unplayable and have lost/am losing a lot of progress/currency trying to play.