Around wave 140, six wespes appeared at the top of the map. There wasn't an alert saying that it was a wespe blitz and I didn't get any extra TP. My bunker got wasted a few rounds in and everyone died. The game did not end and i just waited for the wespes to kill everything that tried to go past my line until the next tactic change made them despawn. Thirty rounds later, the Germans did finally change their tactics and the wespes disappeared. The game acted as though they were still around, showering the newly spawned Germans with artillery shells. The sprites for the wespes disappeared but they acted as though they were still there. Interesting glitch that I found amusing, I'm hoping it shows up again