no indicator in heat rate after updated into fw12.23

Yes the same in beta 12.20 

The 5 colored lines are zones 1-5, when my HR hits the lower part of my zone 1, a marker shows. When I’m below zone 1 there is no marker. Seems like that is how it should be. Since I am not registering an HR in one of the 5 zones represented on the glance, then a marker in any of the zones would be incorrect. 
SA

Hmmm, that would kinda make sense... Haven't really noticed or bothered with this issue but indeed saw no marker here either but this could be an explanation.

I just changed the lower part of my Z1 to like 30bpm and indeed now I see a marker at the right of the grey Z1 area.

Thanks for this info, at least it works as intended (whether intention is logical is something else though... I think it would make more sense to show the marker way to the left at  all times even when it's below Z1)