If I set a menu with sub menu everything is fine but if I added a 3rd sub menu and trying to select it the whole menu close and took me back to home menu
This issue has been fixed in the latest version(3.0.3) of the theme.
Kindly update the theme and plugin to the latest version, go to Theme Panel > Scripts & styles, disable all the files click on the save button, now enable all the files, and click on the save button a couple of times.
PS- make sure to enable all the scripts & styles files, and check.