The problem was solved. If you ask me what caused the issue I have no ideea. All I can do is describe the exact steps I took.
1. I took of the screen protector just in case it was causing the issue
2. I restored the phone to factory settings
3. After that I didn't install any apps and didn't intstall any backups, no passwords, no face recognition, no pin, I omited all of the steps.
It seemed to have worked flawlessly

I have no idea why and what was actually casing the issue with the notification bar. One day has passed so far and no notification bar issue so far.
I hope it's gonna stay this way
