"An Unexpected Disconnection Occured" losing maps and temple runs

I have been getting this issue frequently, where the game disconnects saying "An unexpected Disconnection occured" and takes me to log in screen. When I log back in, the instance is reset and I lose any map portal or open temple. I lost several maps today as well as two temple runs which cause chain destabilisation setting me back several hours worth of progress.

Additionally, there was a temple run where it automatically closed the temple when I portalled out of it to exterior of the temple (into the vaal ruins). I did not close the temple or disconnect out of the game. Again, losing a lot of progress.

Kindly look into this issue as it is a game breaking problem where time and resource of a player is being wasted.