How to disable the camera movement with the cursor in preview mobile unreal

Hi,

I am doing a mobile app wich is a large map and i will navigate this map with drag and hold through touch event.
When i simulate this app on selected viewport, the mouse works as should be, that means, it only moves the camera when i press the left button.
But when i simulate on mobile preview, the mouse cursor is keeping movement the camera even with the button released.
How can i get the result of selected viewport on mobile preview?

Thanks,