Navigation DropDown Links Don't Work On Mobile Devices

Hello

While the Sensitive theme is good. The drop down menu links do not appear to work on Android Tablet, Ipad, Sony Experia Z2, Samsung galaxy S2 and iphone.

Is there are fix for this? I have used a child theme to make some changes but I have not changed the navigation or header page.

I have not added any extra javascript. The menu items work fine for desktops, imac, PC etc.

To ensure it was not my changes I have disabled all plugins and then installed the clean Sensitive parent theme and just added the menu. But the drop down menu links do not work on these devices also. I think the was an issue with Bootstrap ‘ontouchstart’ issue in the past?

Has anyone else had this issue or are aware of it? Hope someone can help! – Thanks in advance!