Icons Link Disappearing

Hi,

I am using the same headers for both sites, new.ainterpreting.com and avia.ainterpreting.com -- which you will see on the top (phone nmr, vp nmr, email, FB and Twitter icons, Login button).

FB/Twitter icons, when you click on it, it directs to the right URL. I added the URL link by double clicking which allows me to add the URL link and change the color to green.

However, when you hover, it disappears. I have tried to go into settings, elements and there's no option for hover.

Can you please walk me through this?

Thank you,
Smitha