After playing around with the Shapediver settings for zoom, rotation and pan speed, we noticed that the setting for pan speed does not change anything in the viewport. Zoom and rotation speed works fine, although we usually have to set the rotation speed realllly low (0.02) to be usable, especially on a phone.
We had to disable panning all together as it is way too sensitive.
Could you check that panning speed actually does something please. Probably a typo somewhere. Weirdly it works in the ShapeDiver app interface, but once its embedded the pan speed is back to its default value, which is way too high.