No. It should zoom incrementally when tapped, or a continious zoom if held down. Three things you could do to troubleshoot. First, move the map to a different part of the display and see if it still has the problem. Second, go to LOCAL DISPLAY SETUP -> TOUCH TEST and see if the touch function otherwise works normally. And Third, take a video of what you see happening and send it in to our Tech Support folks at support(at)dynonavionics.com.