Application Hangs When DPI Aware and Desktop Scaling at 150%

[cwhitlatch]

Describe the bug

With DPIWare enabled ( via app manifest or programmatically ), when a user has display scaling set to 150% and a nested visual of zero height is present in the visual tree, WinUI3 applications will freeze with only Minimize/Maximize/Close functioning. All managed code will no longer run, including timers and callbacks.

Steps to reproduce the bug

We are struggling to create a reproduction. We can reproduce the issue everytime in our own application.

Expected behavior

The application does not hang / stop responding.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.4.4: 1.4.231219000

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response

[cwhitlatch]

A sample app that DOES NOT REPRO but is similar in structure to our most frequent example: Hang.zip

[cwhitlatch]

Digging further by enabling all sources/symbols it looks like a Layout Cycle Detected unhandled exception is being thrown. I have tested with 1.5 experimental2 and am still seeing the same issue.

[cwhitlatch]

This issue appears to have been reported several times, and fixed in 1.5. Testing with -experimental2 has shown no recurrence.