Vo2max suddenly stopped from being calculated

Hi all, hope someone can help me figure out what happened.

About 2 weeks ago suddenly Vo2max stopped from being calculated for my outdoor runs & walks workouts. It used to always calculate it at the end of each of those workout types.

I changed nothing in settings, and I do my workouts as I always have... there is enough time in the workout for Vo2max to be part of the metrics.

Maybe the only thing that happened is iOS/watchOS software upgrade.

I tried to restart my watch as well as my iPhone, didn't fix the isse.

Has anyone experienced the same thing lately? Maybe there is a fix? Thank you!