Talk:Spy/@comment-90.184.79.169-20170222000209/@comment-136.61.128.73-20170315074844

It probably wasn't kill all remaining enemies, but kill an enemy. There's a 15 minute timer that you have to kill enemies for. If nothing is killed at least every 15 minutes then this happens.

I regularly do pavlov spy missions and have never experienced anything remotely close to what you're describing, so the afk timer is my best guess.