I don’t have iPad so tested it on iPad simulator and it is working fine for me.
I have also asked my colleague to test it on iPad device and i hope he will reply soon.
If it is working fine on Jevelin demo site thes please see whether there is any misconfiguration or conflict on your site which is causing this issue.
Please try changing header style.
This can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.