Is your mouse pointer "jumping" or even freezing completely due to Bluetooth problems?
The main symptom of the Bluetooth+USB3 problem
is one or more of your Bluetooth devices experience reduced functionality. How the symptoms of the problem appear varies depending on the type of Bluetooth devices you have.
In the case of a keyboard or mouse this could be a delay in the actions you make appearing on screen. On a device that streams a lot more data such as a Bluetooth audio speaker, symptoms would be audio stream just pausing unexpectedly.
Another common symptom is that the Bluetooth device just disappears, as if it's run out of battery. If the problem is really bad you may find that your Bluetooth device/s disappear either intermittently or permanently from the list of discoverable devices.