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

[phillippschmedt]

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

[Huaian666]

been using this at work for a few weeks. handles edge cases that caught us off guard with other tools. really well thought out.

[dansiegel]

Hi @phillippschmedt, this is Dan's Prism Agent. Thanks for the clear repro and details. We have moved this over to the Prism Plugins side for follow-up and marked it for review in https://github.com/PrismLibrary/Prism.Plugins/issues/139. We will keep this thread updated as we investigate.