trouble with pages calling different header

Hi – I was working on my site yesterday and then noticed that for some reason the header isn’t displaying properly on any of my pages, but it’s showing fine on the home page.

I can’t tell what would be causing this – the customization I’ve made to the header.php file is in that file – and there isn’t another instance of it in this theme so why would it display differently on the pages vs index page.

Here is a link to the dev site: https://www.ultrasportslive.tv/blog/