is your profile stock or modified?

stock has

general
control
FTL DPS

keymaps off only turns off general and FTL DPS.

so if you added more mapsets. then you need to add them to the keymaps off mechanism.
if thats not the case look in your control mapset and your culpret is probably in there. try moving that mapped key to general. cause you dont want to turn off control or you'll be in big trouble.