It appears that on my ID are two alive characters at the same time.
After a server restart I lost all my gear and I was just another freshspawn. I played for a bit, but when I reentered the game I had my old stuff back. Next time I had it lost again.

However now I can't play more than 20 sec before battle eye kicks me out. Nothing of that happens on hardcore servers.

I think it is because there is a conflict with my ID since there are two alive chars.

am playing on the Regular and all problems I had on regular, Battleye also kicks me only from regular, while hardcore works just fine

I have reinstalled the game, validated local content and manually updated battleye but nothing helps.