This is a common issue with G502.. I had it months back and found out Reddit is full of threads stating similar issues. This could a software issue (if you’re lucky) which can be resolved with following steps. (1) Right click on Windows or Start button and select Device Manager (2) Under the ITC device, search for Logitech Virtual G-Hub Mouse (3) Right click on it, select Uninstall (4) Disconnect the mouse from the computer (5) Restart your computer (6) Pair the device to the computer again and check with cps test If it’s not fixed, you gotta have it repaired or reinstall new switches yourself.