It has been a long known issue that this happens when putting from the fringe, or right form the edge. NEVER have I seen or read of it actually changing on its own, if this is the case, you might want to make special note of hole, hole location, etc and report the bug next time.
Right-click the game screen and you will see an option for bug submission - that is wgt's preferred method, as it sends them all the pertinent game data.