I had the strangest run. My 17th at that in PoTD (full runs each time). I was sitting at 29/27 and since I forgot to remove the join in progress I ended up on lvl 49 last boss, and I literally mean last boss. I asked what happened and they said other player dropped not happy with drops. According to them, they had no drops from the entire 41-50 runs. I commented that I was a little sad to know that I would have to start over from 1 without having had a chance to attempt at least part of the whole run 41-50. It is my fault in the first place to be in that situation though, as I forgot to remove the *in progress* .
Here is the strange thing. We started on the last boss and she did her insta-kill type of action and we wipped. I am pretty sure the wipe happened because they didn try hard enough..either because they felt bad or because they too were not happy with the drops...but thanks to them I was able to attempt again that 41-50 and reach 29/29 on my 18th run. Did a 19th full run that brought me no upgrade..There were silver chests opened but the upgrade never applied to me, 3 silver chest opened to be exact.
Even if I cant say 100% it was on purpose, it sure saved me a few hours !!