NavigationView Bug in WinUI 2.6

Describe the bug I’m not quite sure what caused the problem But this only in “Version2” and Set NavigationView.PaneDisplayMode=“Top”

ControlsResourcesVersion="Version2"

Normal in Version1

BUG in Version2, all the NavigationItem except “Bluetooth Audio” disappeared

I could still found them in Visual Tree

If I changed the PaneDisplayMode to “Left” (Hot reload XAML), All items reappear

If I changed the PaneDisplayMode to “Top” again (Hot reload XAML), but indicator is on the left ???

And SettingButton is much wider like this

And the animation is not correct…

I created a blank application and used the same controls. But they work perfectly. So It’s very confused, is anything wrong?

If anyone could help me look at this issue, I would be very grateful. Thanks.

Steps to reproduce the bug

Steps to reproduce the behavior:

1. Download the source code from my open source repo Source code
2. Go to App.xaml, change ControlsResourcesVersion from “Version1” to “Version2”
3. Build and run “Package” project (Debug X64) in the solution
4. NavigationView is in MainPage.xaml Line 353

Expected behavior Should be same as WinUI 2.5 Or WinUI 2.6 Version1

Version Info

NuGet package version: [Microsoft.UI.Xaml 2.6.0]

Windows app type:

UWP	Win32
Yes

Windows 10 version	Saw the problem?
Insider Build (xxxxx)
October 2020 Update (19042)	Yes
May 2020 Update (19041)
November 2019 Update (18363)
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
Xbox
Surface Hub
IoT

[zhuxb711]

@StephenLPeters I find the key code that lead to this issue finally. Please kindly check, thanks.

Application.Current.FocusVisualKind = FocusVisualKind.Reveal;

Demo: BugTest.zip

[StephenLPeters]

fixed by #6317