Just experienced this a few times lately, just now in a RG game at Whistler, where a 'slip and hop' on the meter on a drive cost me a good score.
Just dug up this old thread and it looks like wireless mouses could be the problem. But it's hellish annoying when it happens.
Strange thing for me is that often, though the meter ends up 'clicking' itself right at the 'fade/slice' end of the meter, sometimes the ball ends up scuffing somewhere to the hook side. Crazy.