I've had a Steelseries Rival 300 for around a year, with no problems until now. If the left mouse button is pressed and held down physically, the computer won't register the same input. Instead, the computer will register that the button is held down for a short while, until a new click is registered.
The problem has occurred on multiple computers.
The problem is not reproducible, however, the problem occurs every ten seconds or so. There is, as far as I'm aware, nothing I can do to trigger the issue.