1. Several times during co-op we've completed all objectives and it will not progress. I was on [WINDOWS 11 PC]

2. I was using Quick Play Co-Op

3. I was playing as Cati with a Drizzt

4. No work around, tried suicide to respawn last room (Cultists to stop on Act 2 of Crystalline Dreams 'Act II: Crystal Harvest'), tried killing/exploring whole map

Similar incident happened last week with co-op while we played an Act 3 where you gather wisps to revive the forest spirit but after killing all side-bosses and gathering wisps... nothing. (Act III of The Crystal Wraiths - Seven Masters)

Of course with the wonderful save system in mid-mission I totally didn't lose over an hour of progression with my 2nd character including a legendary ring and a whole maps worth of gold/lore/items....