Hi there
I have my 945 4 months, and on two occasions the watch has stopped tracking. On both occasions I was out training and I noticed it stopped tracking my pace / HR / distance. When i push the watch buttons, it is very slow and sometime freezes when changing from one to another.
This is extremely frustrating. To resolve it, i have to do a factory reset on the watch and it takes 2 days for the watch to sync again
Joe