Move ring does not update from a Wattbike workout (Health app issue?)

when I do a workout on my Wattbike Atom it only partially updates apple health… the duration of the workout is recorded ok and in the Apple health app I can see the kcalories in the ride details… but they don’t get added to the Move (Kcalories) ring.. but the elapsed time of the ride is added to the exercise ring.

I am using Wattbike hub app which is fully permissioned to write to health.

Example… on Friday 1st March I did a Wattbike ride that is recorded and shown in Fitness on my phone with 489 KCals (Active). Here are 3 screenshots from my phone

The workout is clearly captured into health/fitness

And when I click on the workout I can see the details - the 489 active kcals

However, my Move ring only has 452 KCals for the entire day…. Which is from walking and not the cycling workout. You can even see on the timeline that there is a large spike of activity on Exercice at around 18:00 but no corresponding spike in the Move timeline…