When I leave a random party (after helltide for example) I get stuck in the party leaders progress/world without the game clearly stating that I’m still using someone else’s progress.
I only noticed this because I couldn’t find certain strongholds I tried to complete.
Returning to the character screen and logging back on solved the problem. The strongholds didn’t show because my previous party leader had already done them. This has happened to me multiple times alredy and even though the there is a workaround, it feels annoying to leave the game every time you are done partying up with random people.