Hey Bryan,
You can’t disable interactions for a certain device/screen width so you’re best off making a duplicate nav bar which is only visible on mobile devices and make your current nav only visible on desktop. It takes less than a minute to do and that way you can create separate interactions, or lack there of, for both.
There’s a short thread on the same issue here: How to Disable Interactions for Mobile Devices
Definitely something to add to the WF wish list though.
Good luck!
UXM