Steam log-out + full reset of account

I was playing perfectly fine yesterday throughout the day, and then suddenly I couldn't connect to service. My account got logged out on BF6. I was trying to reconnect and relog, but unsuccessful. Finally I logged in and my account got fully reset.

I lost all of my progression, all of battle pass progression, lost in-game currency...

Also, when I go to sign-in to another device, I get a message that I will be logging into my steam account but I need to input some 6 numbered code, which I don't know where to find...

Has anyone experienced anything similar?