Hey! First of all, thanks for trying to solve my issue but I don't think that in my case it's related to SSD. I have 2 M.2 SSD drives.
1 - WD BLACK SN750 SE 1TB (read speed 3600MB/s, write spead 2830 MB/s)
2 - XPG GAMMIX S11 Pro 2TB (read spead 3500 MB/s, write spead 3000 MB/s)
Like I mentioned in my original post - I tried moving Dayz and Steam to my first drive and it didn't helped, also tried moving steam and dayz to my second drive and it also didn't helped.
// I will put it to test read/write spikes when closing inventory, maybe I will find there answer to my problem but I doubt it that it can be problem on 2 SSD drives.