My 42 mm stainless link watch has just started showing a green square whenever I want to change a setting with the rotary dial. For example in setting a countdown timer if the hour is selected and I rotate the dial nothing happens, but a green square appears overlaying the 2:00 position on the dial. If I choose to start an activity and change the calorie settings all I get is a green square just about the + setting. If I press in the rotary dial to choose another activity on the program face I often just get that same square. I have shut it down and restarted it twice but get the same thing. So my watch isn't really useable now.