Wrong Cadence Data

Hi,

I've had my Forerunner 265 for 1 month now and the cadence data was always wrong for my runs (in the app, on the watch and on the web interface). 

I recently contacted Garmin Support and was issued a replacement to see if the new watch still has the same problem (it does). 

I am currently running version 23.20 of the firmware.

Here is what happens : The run cadence always averages at around 80-90 spm while running with occasional jumps to correct values (170 spm, 184 spm). I compared with the data from my previous watch and I always had a pretty consistent 180 spm.

Here is the last run I recorded : 

data

Is there anything I can do to fix this?

There also seems to be an issue with my VO2 Max. It's not appearing even after multiple workouts (runs outside, cycling outside) over the course of multiple weeks (6 weeks now). I searched online to find any information and I seem to be doing everything right for it to be calculated. Is it supposed to take this long?

Thank you.