Difficult to say. You could try sending me the project. Is the touch-area where you think it is? e.g. are you clicking the right area? I'm assuming it's invisible.
Sorry, the project is not convenient to provide source code.
The target device's display screen is 400*400, so the TouchArea parts are correctly placed, and the coordinates of the TP can be printed by serial ports.
Only click touchArea3 does not enter the callback, other normal.
touchArea3 does not call touchArea3. SetVisible (false);