Ground Contact Time Balance (Left/Right) missing since update 18.22

I use a connected HRM Pro plus and have received the GCT data ok. Not sure about native data though.

GCT Balance ONLY with HRM strap (or RD Pod) not without , as measurement has to be centre of body.

I use the HRM strap

I have runs with 18.22 (on the Forerunner 965) and HRM Pro+ where Ground contact balance is there. Have you checked that your HRM strap was connected during the run?

Check to see whether the HRM strap picture shows at the bottom of the activity as viewed on the Garmin Connect website. Eg.

That's another issue, I have never got that equipment to be added to my activities.
Went through my activities on Garmin Connect website. And it is clearly visibile that any activity after the 18.22 upgrade is missing the GCT. 

I will check the battery on my HRM, it could be that my upgrade to 18.22 coincided with the battery running out on the HRM

Also remove the connection to the watch and re-pair it maybe

Check mine on 18.22 and GCTBalance is visible