Fenix 6X pro sapphire heart rate issue

I have owned the new gamin 6x pro sapphire since the month of October everything worked great, and then I notice a major malfunction with hr reading 20-50 above normal sleeping to walking. It offsets all my workout measurements. The first time I had to reset the watch to factory setting which fixed it but I had to spend some time and input all my own settings again. Now it happened again today. Garmin I need a permanent fix for this issue. I payed 1300$ ~ for this watch I expect it to work.