WindowsCommunityToolkit `MarkdownTextBlock`'s links will cause app freeze if background acrylic is applied to `Page`

`MarkdownTextBlock`'s links will cause app freeze if background acrylic is applied to `Page`

Open lee011 opened this issue 2 years ago • 23 comments

Describe the bug

When hovering on a link in MarkdownTextBlock of a Page with background acrylic for some time, the app will freeze.

[ ] Is this bug a regression in the toolkit? If so, what toolkit version did you last see it work: I don't know.

Steps to Reproduce

[ ] Can this be reproduced in the Sample App? (Either in a sample as-is or with new XAML pasted in the editor.) If so, please provide custom XAML or steps to reproduce. If not, let us know why it can't be reproduced (e.g. more complex setup, environment, dependencies, etc...) Unable to reproduce in Sample App.

Steps to reproduce the behavior:

Set a Page with Background="{ThemeResource AcrylicBackgroundFillColorDefaultBrush}"
Set a MarkdownTextBlock with markdown text with links (like [This is a link](https://www.microsoft.com/))
Build and run the app.
Hover on the link and wait for tooltip of the link appears.
The app freezes.

An app to reproduce this issue: App1.zip

Expected behavior

The app should not freeze when hovering on a link.

Screenshots

https://user-images.githubusercontent.com/11925743/142405683-300572dc-5580-48ab-a1dc-30c02ba8b950.mp4

Environment

NuGet Package(s): Microsoft.Toolkit.Uwp.UI.Controls

Package Version(s): 7.1.1

Windows 11 Build Number:

[x] 22000

App min and target version:

[ ] Fall Creators Update (16299)
[ ] April 2018 Update (17134)
[ ] October 2018 Update (17763)
[ ] May 2019 Update (18362)
[ ] May 2020 Update (19041)
[x] Windows 11 (22000)
[ ] Insider Build ({build_number})

Device form factor:

[x] Desktop
[ ] Xbox
[ ] Surface Hub
[ ] IoT

Visual Studio version:

[ ] 2017 (15.{minor_version})
[ ] 2019 (16.{minor_version})
[x] 2022 (17.0.0)

Additional context

Nov 18 '21 11:11 lee011

Hello lee011, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible. Other community members may also look into the issue and provide feedback 🙌

Nov 18 '21 11:11 ghost

I wasn't able to repro the app freeze, but when interacting with this project's files within Visual Studio 2022 (like trying to expand MainPage.xaml within the Solution Explorer window) caused VS22 to close unexpectedly and without warning four separate times.

Nov 22 '21 22:11 XAML-Knight

@lee011

Do you by chance have the Visual Studio Designer open (such as, for MainPage.xaml) in the IDE while this is happening?
Could you update your App.xaml to this newer style for XAML controls, and see if the app still crashes?: <Application x:Class="App1.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:controls="using:Microsoft.UI.Xaml.Controls" xmlns:local="using:App1"> <Application.Resources> <controls:XamlControlsResources> <controls:XamlControlsResources.MergedDictionaries>  </controls:XamlControlsResources.MergedDictionaries> </controls:XamlControlsResources> </Application.Resources> </Application>

Nov 22 '21 23:11 XAML-Knight

I wasn't able to repro the app freeze, but when interacting with this project's files within Visual Studio 2022 (like trying to expand MainPage.xaml within the Solution Explorer window) caused VS22 to close unexpectedly and without warning four separate times.

Confirmed that VS appears stable as long as I don't have the VS Designer open (see ref #4279 and #4310).

Nov 22 '21 23:11 XAML-Knight

@lee011

Do you by chance have the Visual Studio Designer open (such as, for MainPage.xaml) in the IDE while this is happening?

Could you update your App.xaml to this newer style for XAML controls, and see if the app still crashes?: <Application x:Class="App1.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:controls="using:Microsoft.UI.Xaml.Controls" xmlns:local="using:App1"> <Application.Resources> <controls:XamlControlsResources> <controls:XamlControlsResources.MergedDictionaries>  </controls:XamlControlsResources.MergedDictionaries> </controls:XamlControlsResources> </Application.Resources> </Application>

This happens regardless of whether Visual Studio Designer is opened or not.
I have tried to modify App.xaml as above, but still have problem.

Nov 23 '21 02:11 lee011