My BMW Nav6 unit (about 1 year old) has developed some unstable behavior when installed on my 17 R1200GS. For the past couple of weeks, after the GPS boots up and when I first start off with the bike, it begins randomly switching between screens - although the same screens keep appearing (a data entry display and a route definition display most frequently). It still responds to touch and the WonderWheel but always flips back to these displays. I can see the engine data display momentarily with what looks like valid data so it appears to be communicating with the ECU. And the current position GPS display appears correct but again, only stays on for a brief second. My initial thought was the battery was toast but when I remove the unit from the bike, it is rock solid and will last for a few hours on the battery. I also looked at the bike mount contact pins - they are all exposed and look clean. Re-seated the SD card and the battery. I don't think this is a temperature issue - my garage is warm and the outside temps here at the moment are not below the low 40's F. The unit software version just installed is 5.50 although the issue predates this update (I think...) Anyone seen this kind of behavior?