VO2Max no longer updating?

I've been using my vivoactive 4 for three weeks now and all was fine (except downloading Spotify music of course, but that is a known issue apparently), but Monday 14 Oct is the last time my VO2Max got updated.

- Oct 14, did a run, no issues, VO2Max updated
- Oct 15, ran again, VO2max did not update, but there was server maintenance, so I thought that was the cause
- Oct 16, another run, but still no new VO2Max estimate

In the Android app I can see the overview of my VO2Max stats over the last year (updated until 14 Oct), on the website (connect.garmin.com) the only mention of VO2Max is under reports and no longer as a separate menu item:
 

I got an app update and FW update a few days ago, so maybe the issue started from then, but I'm not sure.

Is this a known issue? Are more people experiencing this?