'How to remove strange highlighting of UINavBar when scrolling UICollectionView?

I have a child navigation view controller with a collectionView embedded in it. When I scroll it, the navigation bar appears to be dimmed a bit.

It looks like this:

Does anyone know how to remove this behavior?

swift uicollectionview

Solution 1:^[1]

I was setting my navigation bar appearance globally like that:

let appearance = UINavigationBarAppearance()
appearance.shadowImage = UIImage()
...

UINavigationBar.appearance().standardAppearance = appearance

But I finally managed to find the fix. You just have to add this:

appearance.backgroundEffect = nil

and the problem goes away.

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Solution	Source
Solution 1	Beaxhem