I get pauses that last 20 sec (exactly, I think) all the time (I'm playing Killing Flor on Mac now)
Often when I start the game, it'll pause and I'll start of with the trader clock at 40 sec (20 gone)
About 30% of the time when I click any option in the game browser it pauses for 20 seconds. Sometimes when I click "Exit Game" it pauses for 20 seconds, is this the same issue?
It never pauses during gameplay, except for 1 sec when the wave starts, so I never die as a result of this glitch.