Vaal Temple Constant Disconnection - Lost Instance

This is the fourth time I've been disconnected inside the Vaal Temple and lost the whole run. The error happens randomly; the last time, I was just walking around. I get disconnected from the server, and when I come back, I'm at the door, and the dungeon is closed.

It's very annoying to lose several dungeons because of this. The mechanics are based on completing several maps to open one, but when I open it, I can't do it. It's a huge loss and significantly impacts the progress of the game. Please look into this.