[Party] Vaal temple counted as closed and destabilized/removed rooms even though I didn't close it

Hello,
I was doing a temple run with other players and when we left exited to the temple ruins with a portal, I found out the temple destabilized and is counted as closed already.
I am able to put rooms and click run temple, but the "Atziri'S Temple" big portal is still open and I can go in and I find all our rooms cleared.
Things that happened during that run:
- I died multiple times due to the mob density/monster health being too high for my survivability
- A player exited to the Temple ruins and went to his hideout, while still in the party. He left the party after that.
I cannot think of anything else that might have triggered it.
Party settings were free for all and level downscaling "on" if that matters.

quick update: while trying to open a new temple portal I get this response in the chat

Another thing I remembered just now, and may be helpful, during the Temple run my game crashed because there were too many particules and monsters on the screen. So I close it, and start it up again. I hope that’s helpful as well