My Vivoactive 4 (one year old) has an inaccurate GPS tracking since around beginning of this year. For example on a hiking tour today I "walked" 4k during a break. The 24km long hiking tour were 36km long with my clock. Friends of mine who where on the hiking tour today, didn't have this problem. Furthermore after stopping the tracking no map is shown on the clock as well as in Garmin Connect. GPS signal is activated. I tried combinations of GPS with or without Glonass and Galileo but it did not work. Can you please give me a hint what I can do?