hrr heart rate zone setting changed by the watch

WOW! mutation!

my old HRR zone setting in watch, garmin connect in phone and web:
55-59
59-65
65-74
74-84
84-100

without any running, after two days, in the watch now becomes
65-68
68-73
73-80
80-88
88-100

AFTER 1 hour, it is now
73-76
76-79
79-84
84-91
91-100

but in the web of garmin connect is still the old setting!!
I will die if I follow the zone setting for running!!

so.... switch to max HR will help?
I decided to use standard max HR zonation and see if it will change by itself!

WOW, it still changes!

my old HRR zone setting in watch, garmin connect in phone and web:
55-59
59-65
65-74
74-84
84-100

without any running, after two days, in the watch now becomes
65-68
68-73
73-80
80-88
88-100

AFTER 1 hour, it is now
73-76
76-79
79-84
84-91
91-100

but in the web of garmin connect is still the old setting!!
I will die if I follow the zone setting for running!!

so.... switch to max HR will help?
I decided to use standard max HR zonation and see if it will change by itself!

EVEN after changed to max HR standard zonation,

it changes from standard 100-90, 90-80, 80-70, 70-60, 60-50
to 97-91, 91-83, 83-77, 77-69, 69-63

What the hell is going on??

Wow

I'm having the same problem - The zones in the watch keep changing . i set HRR with a fixed RHR and 50-70-80-90-100 zones on GC and on the watch - then some time later on the zones change on the watch only . I was running with a BPM of 140 that should be top range of Zone 2 and was registering as Warmup zone 1

Running into this same issue. As someone that is training for a half marathon based on %HRR and heart rate zones, this is incredibly annoying. I discovered it a few runs ago when I was supposed to be in a warm up Zone 2, yet my 235 kept saying that my HR was out of zone range, even at 130. Again, such a mess in terms of software.