When I'm increasing/decreasing sound volume by holding FN+F11/F12, it becomese decreasing or increasing infinitely, even after keys are not hold anymore. It's same, when I have FN-lock and just holding F11/F12. I have this bug 4 years already. Only solution is switch off and on keyboard and it stop increasing/decreasing. X times I reinstalled app, drivers and even whole PC. Please fix it.