Ive noticed this too. I dont know if reflex uses bump maping or not, but if you crash into a tree or a bush, it dosnt detect it as a crash untill the model hits the ground. When this happens, just hit excape and then f4. If you have it setup to start the simulation when your radio turns on, just turn it off then back on. My 9C turns on when its pluged in, so it dosnt transmit when its on the sim. I cant use the auto start feature. Hope this helps!!