In iOS 26, the background glass effect of the navigation bar and tab bar does not update correctly after popping back from a navigation controller.

In my app, each tab bar item hosts a UINavigationController as its root view controller — similar to Apple’s Notes app. For example:

• On the list screen, I have a note titled “iOS 26 Testing” [P1].

• When I open it [P2] and then pop back to the list, everything works fine.

• However, if I scroll the note’s content so that the navigation bar and toolbar appear over dark content [P3], their appearance changes to a dark style as expected.

• Then, when I pop back to the list, the navigation bar and toolbar remain in the dark style and don’t update automatically. [P4]

If I slightly scroll the list view, the background updates and the correct appearance returns.

In my own app, this issue is even more noticeable. So, is this a bug in iOS 26?

If so, is there any plan to fix it — or any workaround I can apply in my app?