Transparent Header breaks

Hello –

I’ve been having an issue with the transparent header. It was working fine but then the display behavior got wonky.

http://saltedvine.ca/wp-content/uploads/2016/09/Screen-Shot-2016-09-14-at-3.34.23-PM.png

I disabled and enabled the TH on each page again.. Seemed to work for a bit.. Broke again. Updated Visual Composer. same results.
disabled w3 performance caching etc. same results..

Used smaller logos 300px width instead of 600px.. behaving now..

Had to use custom CSS to make the mobile Nav dark. Copied solution from another post.

Thanks!