I was playing horde mode on xbox live in a casual private match with no mutators on the Overpass map. We started failing waves at about wave 16. The first time we failed a wave and restarted from the current wave, both of our screens stayed red with the omen symbol and we instantly failed again with a score of -1600. We tried to restart the wave again, and he reappeared, but I stood on the red screen with the omen on it and had to buy back in for 3000. However, I lost 1500 cash and stayed on that screen. I paid 3000 more and then respawned. We then beat that wave, and wave 17, but my buddy died on wave 17. He did not respawn at the end and had to buy back in. He didn't respawn until his 2nd buyback. When we failed 18, the same -1600 instant fail happened again and we then became unable to buyback, just kept losing money and instantly failing.