This has been happening for the last couple of weeks, but is not constant.
I join another players adv, when the adv is completed, ie I have received the loot, the adv stays as active until I refresh, which means refreshing game and/or clearing cache. Not a game breaker, just a nuisance as I cannot join another adv until that has been cleared, and when I join the next adv I have to refresh again most of the time as that crashes the game.
So far it has happened with Roaring Bull, Dark Brotherhood, The Nords and Dark Priests.
*Edit There does not seem to be 1 issue... I normally try to visit adv after I have received loot- then get A: it completes B: nothing happens (so refresh/clear cache). Either way - it's bugged