Back button is not visible when navigating from a view with no toolbar to a view with a toolbar button on macOS 15.4 beta

On macOS 15.4 beta 2 (24E5222f), the back button is not visible when navigating from a view with no toolbar to a view with a toolbar button. The back button is visible on macOS 15.3.1 and earlier versions.

Also, the toolbar button shown when run on macOS 15.4 beta 2 is truncated.

This is how it looks on macOS 15.4 beta 2:

And this is how it looks on macOS 15.3.1 and earlier:

Feedback ID: FB16743834

Looking at the macOS 15.4 screenshot more closely, it looks like the back button is overlapping the navigation title.

Back button is not visible when navigating from a view with no toolbar to a view with a toolbar button on macOS 15.4 beta
 
 
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