It seems the "fixes" to this quest (which actually always worked fine for me on previous versions) has possibly broken the quest in that it cannot be completed now.

Once initiated, the marker does go to the proper house now (instead of heading to the map marker), but if you head to the house and it's daylight, it will allow you to enter the house straight away, instead of asking if you want to wait for night. The quest never changes from "wait for night time to rob the wedding", and the quest never completes even after killing everyone and looting everything.

I followed the people, but went back to the church first to see the bishop before going back and entering the house, not sure if that made any difference - as previously this quest always worked for me.

I've had this happen to me in 1.02 and I did same as you did this time. I first went to the Bishop. It might be what breaks the quest, I guess?

Thanks for your insights guys - it definitely sounds like it might be visiting the bishop that does it.

At least this one's not game-breaking - it just means the quest hangs around forever. It also means I don't get XP for it, but considering how much XP gets doled out in this game it probably won't make any difference (I usually end up with surplus XP for everyone by the end of the game).