I've been having problems with my mouse cursor. (Razer Hex)
Other specs are: i7 6700, AMD R9 390(updated), Windows 7 64bit Home Premium (updated),
i also use the Razer and Logitech software (G510s), and Killer Network Manager (msi) on default, and also Discord.
Ocasionally when i try to right-click to look or move, it will not grip, or it will break grip.
Resulting in dangerous situations, usually death if during a fight.
Now, today i was fighting Balthazar (To Kill a God)
And midway through the fight, this problem became even weirder.
The cursor did not dissapear when l right-clicked. I could see it sliding across the screen, instead of me turning properly.
It was technically possible to turn this way, but only a tiny bit and very slowly, and the "grip" was "weak".
Logging out did not fix the issue, but restarting the game did.