What I have discovered over time is that the plug which I use to charge my Surface is on the same electrical circuit as a set of lights. When the lights are on, this somehow causes the issue of the mouse freezing when the Surface is plugged in. It explains why this was only happening in the evenings for me. When the lights are off or I'm plugged into a plug on a different electrical circuit I don't have the issue.
Mark,
I assume you mean the keyboard lights? I think I've read this elsewhere.
- JT