Facing an issue with my 945. Whilst running a garmin coach workout the watch starts fine but frequently after about 400m the watch drops out of the workout and displays the watch face. If I notice and press to enter the run menu then the watch goes straight back to the workout, re-establishes GPS and continues where it left off without losing much data. If I don't notice then it will lose data until the next time I check my time and hit to enter run menu. It retains all the data before the 'crash' but there will be a missing chunk until I manually re-enter the run menu. Strange thing is that it happens at the same spot on my regular route, so must be time/distance related perhaps? Any ideas how to resolve?