To recreate:
Press and Hold Right Mouse Button, while holding press and release another mouse button (MB3/4/5) without moving the Mouse (so the cursor / view doesnt move), then release the Right Mouse Button.
The release of the Right Mouse Button doesnt register and so you stay in character view mode.
Cursor stays hidden or cant be moved.
Have to click Right Mouse Button again to for it to register the Right Mouse Button release.
Had this with my mouse since 10.1, bought a new mouse, still have the same issue with new mouse.
Can reproduce 100% of the time.
MB3/4/5 are assigned to abilty cast keybinds (Action Button 10/11/12 respectively)
Never happened before 10.1