Overview:

The end-user can switch slides in a CLM Presentation by using a mouse. However, the end-user cannot switch the same slides when using the touch-enabled device.

Root Cause:

One possible reason for this issue is that the custom javascript does not capture the touch event. The fallback event is not captured as well. 

Solution:

var touch = ('ontouchstart' in window) ? 'touchstart click' : 'mousedown';

var touch = ('ontouchstart' in window) ? 'touchstart mousedown' : 'mousedown';