I have this problem on ‘j’ but not on ‘f’―the comparison lead me to the thought that I really should glue a grain of plastic on the ‘j’. We here are supposed to be hackers and to do-it-ourselves, after all.
The same can be done to other keys, I think―if you have the unfortunate configuration of an unsplit F-row, for example.
I thought that's what the bumps on the f and j keys were for.