I'm curious, did you recently upgrade to software version 2.7.4? I had the same issue - it occurred right after I upgraded to 2.7.4. I performed a system reset and haven't witnessed it since. You may decide to reset your system, but if you do, you may eliminate the problem... which from Kemper's point of view may be good, but not so good to get this issue isolated and fixed.
Yes as a matter of fact I did recently update to 2.4.7. I played for about an hour yesterday without incident but if it happens I'll back up and do a reset. Thanks for the tip!!