F7x, running dynamics not show up

Hello, 

I added running dynamics fields (both of them) to run profile activity.

Immediatly after i start activity, Watch shows that external hr was connected, but i dont see running dynamics field... I have to wait a lot of minutes to show up And start measure.

If i start running before i can see those fields, i dont have running dynamics metrics in activity. So i have to wait till it show.

HRM TRI, new battery.

This happens in Every single run. Sometimes it show in firt minute, Sometimes it need a few minutes.

Very disapointing. This never happend in Last two years with F6x.

Help pls. Or Garmin can u fix it? Looks like Bug.