jquery app not working for a cox-cable customer

hello -

this is totally strange, but for some reason, this jQuery dropdown window app is not working for one of my clients who is on cox-cable.

we have tried this on Edge, FF & Chrome, on two separate computers, all with the same results.

it behaves as if the LEFT-CLICK is somehow being prevented from working, almost as if Cox-Cable is disabling left-click on the div, although i am able to right-click and inspect the element -  and NO ERRORS in the console.

i have asked her to try the IPad and see if the problem is also there.

is this even possible?   or could the issue possibly be in the cable-modem-router itself?

thank you.