I am sorry to say but I don't think I can recreate the issue. I was simply pausing the torrent file but it didn't paused (font didn't turned red) but the downloading speed was dropped and suddenly I encountered this a popup informing me about the crash and recommended me to report ...
I'm still pretty sure it wasn't just a lack of peers, since things that had been running that day suddenly wouldn't, and the seed to peer ratios were still normal. I've been on vacation since my post so I haven't tested it much, but they ran fine for the day or two afterward ...