As the title states, when I try to show HR zones for running in GCM, I get the UNKNOWN_EXCEPTION. Moreover, the HR zones fail to sync from GC to FR 920XT. I have to set the zones manually on 920XT, but they get overwritten accidentially by default HR zones on BT re-pairing, which sometimes happen.
I do not know anymore. On the web pages it is not possible, but maybe on the classic page? Or in Garmin Express or directly on FR620 watch. Now I have 920XT.
PS. I did it intentionally, as for now I do need 5 zones, even 4 are much. It would be nice to have the possibility to add/remove zones.
