Loaded and Unloaded called out of order.

[HppZ]

Describe the bug

Loaded and Unloaded called out of order, which causes EventTriggerBehavior and InvokeCommandAction fail to work.

Steps to reproduce the bug

Bug.zip

Expected behavior

1. EventTriggerBehavior and InvokeCommandAction shoud work.
2. UnLoaded event should raise before Loaded event.

Screenshots

No response

NuGet package version

Microsoft.UI.Xaml 2.7.0

Windows app type

• UWP
• Win32

Device form factor

Desktop

Windows version

October 2020 Update (19042)

Additional context

No response

[azchohfi]

Adding @evelynwu-msft.
I believe she might know more about this.
I've reported this issue a while ago, and it is already being tracked internally.

[evelynwu-msft]

This is a long-standing issue in XAML; this comment from @MikeHillberg provides an explanation and workaround.