Hardware – MSI GS65 thin keyboard input does not work temporarily

I have a problem with my MSI gs65.
From a few weeks, when I click on ENTER, I have to click 10 or 20 times to work. This problem does not exist when I press Ctrl + Enter or press Shift + Enter. I do not think that this is not a hardware problem.
What can be a cause of this problem? How do I solve this?