RM mixer/ CS 18 keeps crashing

I am having trouble with RM mixer 32 and CS18. This is the third time this happens while in live performance. During live performances I believe that the RM freezes and am unable to control anything. I have the CS 18 coected to it and it just looses signal. Also when RM crashes I am unable to control levels manually/wireless . I have to de a restart the system in order for it to go back to normal, but sometimes it happens more than once. I dont want to keep doing a restart especially in a middle of a performance.

Im I doing something wrong? does it have to do with wireless coectivity or power supply? please let me know