Runn Incline% Data missing, shows Runn logo instead (Tactix 7)

Like the issue reported in https://forums.garmin.com/beta-program/fenix-7-series/public-beta-reports/i/public-beta-8-35/ciq-data-fields---issue-npe-runn-incl-spillover-to-other-activities

The Runn Connect IQ Incline% data field never worked for me.  All I get in the data field is "Runn Incline Data Field" with the Runn logo, but no incline % number.
Speed/pace work properly, though.

[Garmin forum is not letting me upload a screenshot here]

But after seeing the above post, I rebooted my tactix 7 and suddenly the incline % number was showing in the Treadmill activity data screen... but only once.
If you exit the activity and go right back in, then you're back to having the Runn logo again but no data number!