Screen lock, not able to enable

Somtimes the screen lock (Y lock) get jammed in an unlocked state. I force this to happen when i disable the y lock, click and hold a location on the minimap, then press G, attempting to ping. After doing so my screen will stay unlocked (regardless of if i press y) untill i die, recal, or choose qn ability to upgrade. Hopefull you can solve this issue. Thanks

(I have my screen set to semi-locked)