Welcome to Android Central! I used Google Translate to translate what you're asking:
"Acer Iconia A500 tablet why I often die suddenly and flame back automatically
Apabial open an application and is running the application closes unexpectedly and tablet dies and then flash back to automatic, on the home page."
So is the tablet actually shutting off and rebooting, or does the app just stop and dump you back to the homescreen?