It stopped completely in my case over a week ago. Granted, for gaming I now use an external keyboard, but I had no issues during normal usage since.
I think it’s just these little metal contacts getting stuck together and heat excaberating the issue.
Sheets such as the ones pictured above are often made out of PET, which becomes soft well below temperatures seen in chips under heavy load.
What helped in my case was holding the laptop upside down as it’s running, pressing the offending keys for several minutes in this position and then leaving it turned off upside down for a while.