Orbit contol touch too slow panning

Questions
1

Hi, I have a problem with orbit control. in mobile, the panning is very slow and you have to keep it pressed in order to pan the scene

I have the following settings

controls.enableDamping = true;
controls.dampingFactor = 0.05;
controls.enableRotate = false;
controls.minDistance = 5.5;
controls.maxDistance = 5.5;
controls.screenSpacePanning = false;
controls.enablezoom = false;
controls.enablePan = true;
controls.mouseButtons = {
LEFT: MOUSE.PAN,
MIDDLE: MOUSE.PAN,
RIGHT: MOUSE.PAN,
};

controls.touches = {
  ONE: TOUCH.DOLLY_PAN,
};

any idea on how to fix it ?
i have uploaded a demo in this site arforshops.com

thank you