VO2 MAX from 52 to 37 after a month of not running due to injury, is it normal?

I had my last run a month ago exactly and for a whole month it said VO2 Max was 52 and this morning when I woke up suddenly the value of VO2 Max dropped to 37, is this normal or is there some error in the software. Otherwise, I use the latest version of the software for Garmin Fenis 6 pro v.23.

Thanks

0 [Redacted] over 2 years ago

How did your watch calculate a new VO2max estimate without recording an activity?

0 Gluki over 2 years ago in reply to [Redacted]

[Redacted] said:
How did your watch calculate a new VO2max estimate without recording an activity?

I don't know, the last time I ran was on July 31, 2022. and since then my VO2 MAX is 52, until this morning when it suddenly dropped from 52 to 37, nothing is clear to me either, that's why I asked.

It is not at all clear to me how he calculated at once from 52 to 37 when I had no running activity at all since July 31