Smart controller touchscreen

Does anyone else has a problem trying to use spotlight with the smart controller? When I try to draw a box around an object it moves the gimbal up and down as my finger slides around the touchscreen. If I tap the screen a bunch or hold my finger on it for a while then maybe tap then draw a box occasionally in will actually draw a box and not move the gimbal. It’s completely random though. Am I doing something wrong? I don’t want to use the touchscreen to adjust the gimbal, only the wheel. Is there a way of turning that off with the touchscreen?