Tried x11 kde session, opened fullscreen game, got black screen then hold power button because of been unable to exit from that. I’ve entered my passphrase and I’ve got nothing, no answer, it doesn’t changed. Even can’t enter UEFI.
When usb plugged in I see instead of hd2 a hd3. So, I don’t have input from keyboard at all.
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Thank you all! I don’t need your help anymore. I got acces to UEFI with dismounting a nvme. Changed boot priority and do nothing at all. Could type my password without that bug. Fortunatelly I have had another laptop near. If it not telling anything at all then just close this thread. In common you need another computer always with you until Linux won’t suck at stability.
It does sound like that nvme was causing the issue. Either corrupted, not configured correctly, or, possibly, faulty. I wonder if it has the same effect in another machine.
As you appear to have resolved the issue and asked for the thread to be closed, I’ll do the honours. But if you do wish it to be re-opened to add more details or questions, please ask by PMing @moderators to let us know.
Also, welcome to the Manjaro Community! 
Cheers! 
Unproductive rant, blaming GNU/Linux for an obvious hardware bug.