Is my barometer dead ? ( lots of fake floors )

Hi,

Since few months I would say ~24.xx update i've been experianceing lot of fake floors. My watch somehow count like 50-200 floors climbed per day while i just walk on flat surface and most of the day spend in front of my computer.... before i had normal values. Also i have more of fake storm alerts... so I'm wondering wether it's firmware update issue or is my watch barometer dead ?

Some of you guys are also experiencing this issue ? 

( I bought the watch > 2 years ago so i guess contacting garmin support is useless now )