home icon in top menu

I notice that the home icon is disappearing from the horizontal menu and then re-appearing as I scroll down the page. When the menu is in “sticky mode” the icon appears, when it’s in normal page mode it disappears.

I see in the page css that the div with id=”nav-logo” is set to “display:none”, and then when in sticky mode is set to “display:block”.

I don’t see any reason to hide the icon, it can very well be present at all times instead of appearing / disappearing.

I saw that in core/includes/theme-generator/style.php there is a rule for #nav-logo with display:none, I changed it to display:block in my child theme. However it still disappears again when it leaves sticky mode and goes back to page mode.

Where is the js (or css transitions?) that are causing this?