TabView: "Element is already the child of another element" thrown when a TabViewItem is switched to

[lukeblevins]

Describe the bug
I migrated my project over to the WinUI version of TabView, but noticed that clicking a different TabViewItem will crash the app with the error: Element is already the child of another element. This bug occurs only when running with a debugger in Visual Studio.

Steps to reproduce the bug

1. Create a project with a WinUI TabView
2. Run Project with debugger
3. Add Multiple TabViewItems to the control
4. Click one of the unselected items

Expected behavior
Clicking an item should simply display its content. The crash and error is unexpected because it only occurs when running the app with a debugger.

Screenshots

Version Info

NuGet package version:
Microsoft.UI.Xaml 2.2.190830001

Windows 10 version	Saw the problem?
Insider Build (18362.10015)	Yes
May 2019 Update (18362)
October 2018 Update (17763)
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)

Device form factor	Saw the problem?
Desktop	Yes
Mobile
Xbox
Surface Hub
IoT

Additional context
The problematic lines of code may be related to line 222 of TabView.cpp

[jevansaks]

Thanks for reporting! Do you have a repro app you can share?

[lukeblevins]

@jevansaks Unfortunately, I can't reproduce this weird bug in another project. Confusing!

[eugenegff]

Seems that it is duplicate of #1245

[lukeblevins]

@eugenegff Agreed.

[jevansaks]

Thanks! I'll close it and we can use #1245 to track.