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How do I make my Forerunner 955 Solar keep the Running HR-zones how I configure it?

I'm on SW 12.27 on my Forerunner 955 Solar and set the Running HR zones to Based on BPM than set the zones BUT next day, that's what I noitice now, it has changed to %LTHR AND changed the zone-values!

Cycling HR-zones do not have this problem