The linked video is not mine. Kawffee on Youtube. Just did a dares with an LFG group and the activity did not complete. Everything was done. It gave us the “objective completed” prompt and no loot. The timer was still counting and the points were getting lowered. After 10 minutes of waiting my fireteam all decided to restart. Same thing happened again. From what I’ve seen so far there hasn’t been much talked about this bug or whatever it is because it hasn’t been fixed. This seems to happen only when Crota is the final boss.