Windows 11 22598.100 Tooltip problem with WPF apps

Andrew Jones 21 Reputation points

I'm finding that Tooltips in WPF V4.8 apps (and earlier versions) are not working in Windows 11 build 22598.100. They appear but then immediately disappear. It happens in all WPF based apps. Tooltips are ok in Winforms apps and also .NET 5.0 WPF apps are ok.

Is anyone else seeing this problem?

Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,701 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
8,677 questions
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  1. Andrew Jones 21 Reputation points

    To prove it I created a brand new WPF .NET 4.8 App, dragged on a button and added a tooltip.

    <Button ToolTip="Test Tooltip" Content="Button" HorizontalAlignment="Left" Margin="92,60,0,0" VerticalAlignment="Top"/>

    The tooltip displays very briefly then disappears, far too quick to read. It happens in all WPF .NET 4 apps regardless of how complex they are. From the very simplest (shown above) to much more complex apps evolved over 10 years. WFP app with .NET 5/6 and WinForms are working fine.