Adding banner causes title disappearance and adding screenshots causing cover image disapperance. It worked fine about 15 minutes ago and now it's broken
It's banner issue on the screenshot

I am pretty sure that is how it is supposed to work by default, at least that is how it was for me. The Page Header and Cover Image are only placeholders until you upload a banner / screenshot to replace them.

If you want your title on the banner, you can add it to the picture. Alternatively, you can use the page description to add it at the top of your 'presentation' (you can also change the size of the text to get a headline).

For the screenshot section, you can theoretically just add your page cover as a screenshot (maybe adjusted in dimensions or a slight variance to make it different from what people get as the search result?).

Hope that helps you.