Vo2 max not updating

Hi there

I think that there's a problem with the VO2 max not updating correctly

The top half show the correct time section  of 4 weeks  April 28 - May 25

But the bottom half is always stuck on  'updated 5/3' not sure if they are using americain date format  ie : 3rd of May or English 5th of March, I running a English version on a French phone,, but either way it's out of date

I've been doing some good / fast / long bike rides lately, all with external heart rate straps so its should be getting better, but no

I know that my other workouts (crossfit, gym and swimming) aren't taking into account as only biking and running change the VO2 max settings and only when wearing a external heart rate monitor, in my case a Scosche Rhythm 24

I've tried a hard reset on the watch, and reinstalled the phone app but always  'updated 5/3'

any ideas ?

Latest firmware on the watch 13:30 Fenix 5X, I'm 61 years old by the way, and for the moment only biking (no running, and not MTB as I know this isn't taken into account)