Search dropdown & mobile menu issues

Hello, I like your theme and would like to purchase it, however I am having some issues that I would like to sort out before I make that decision.

I am currently using WordPress 4.9.4. 4.9.5 is currently out and I have tested with that version but the issues were still occurring.

I had added into the “Additional CSS” section in customize overriding some styles. But have removed these and the issues still occur.

I have disabled all 3rd party plugins, deleted and reinstalled the theme through Appearance > Themes > Add New and have also deleted and reinstalled manually through ssh.

What can be seen on my site currently is a clean install with no changes except for adding menu items so you can view the second issue.

It is worth noting that when in “Customize” mode everything works fine without any issues in the preview.

The first issue is that when clicking the search icon the search form dropdown does not expand.

The second issue is that from a mobile device the mobile menu icon is not visible.

Your help is greatly appreciated.

The page I need help with: [log in to see the link]