[BUG] In .NET 10 / MAUI / Prism 9.0.540 Dialog Mask will not fill the whole page.

Description

When using a Dialog with UseMask="true" the mask will leave a gap the top of the screen. This issue did not exist in .NET 9. See screenshot (white bar on top is the gap).

I am running Prism 9.0.540 but tested it with pre-release 9.1.111-pre too. The issue is slightly different but is still there.

Using .NET MAUI 10.0.60.

Steps to Reproduce

Run demo app on simulator with iOS 26.x: https://github.com/phillippschmedt/DialogBug

Platform with bug

.NET MAUI

Affected platforms

iOS

Did you find any workaround?

No.

Relevant log output