But how it's possible that someone logged one minute after me. I played here today first time since a longer period of time and haven't told anyone about it. What's the probability that someone logged in the same time like me instead 30 minutes before, 2 days before etc..
If your account has been compromised, then everything you listed above is possible, it could coincidental or it could also be someone very close to you doing this. Now that you've discovered the problem is from your end, itis better to analyze every possible scenario and take necessary measures, check your email and other platforms with which you use the same username/email and or password to prevent further losses.
Never happened to me, but it has absolutely happened to people before, and I even saw my friend's account once, he showed me how the history even logged the IP (this was on an exchange with no 2FA) and it was from a completely different country. Guess what his password was? 123456...