I did take out disk1 and did New Config as you mention in first reply, shares didn't change all on place, what did change is Jellyfin won't remember container settings as you mention
Anyway i think issue is solved parity working now on full speed. I will send back Seagate Ironwolf to warranty for replacement, i never expect brand new NAS drive to go bad in 1 week and given fact is only for appdata settings and nothing more