Apple wath ultra 2 heart monitor not working
My new apple watch ultra 2 heart monitor takes about 5 minutes to start tracking my heart rate after I start a run or workout. Then it tracks for a short time, less than a minute, and then loses it and shows the 'grey heart' symbol as it looks for my heart rate for a few minutes, then finds it briefly, etc. It is basiclaly useless. It worked for the first few weeks I owned it, but no longer functions. Have tried repositoning it every way i can think of.
Apple Watch Ultra 2, watchOS 10