I to thought maybe it was a bad mouse on my end, but not so. Keeping cache clear on the computer helps some but still happens occasionally. I have learned when it happens to simply treat it as a practice swing and then try again. If it happens several times in a row I restart my comp and it seems to go away. Seems to be a graphics memory leak type of bug. Some kind of coding issue that appeared 2 or 3 patches back. Guess we must wait till enough folks fuss for the "brains" at WGT do something to fix their unadmitted mistake.