[Bug] UWP Backward Navigation shows "B" page's TitleView content when ScrollView is in "A" page's TitleView

[SunshineSpring666]

Description

If "A" page's TitleView contains a ScrollView, when navigating from page "A" to "B", the "B"'s TitleView content is shown. However, if we navigate back by pushing back button, the page "A" doesn't get its TitleView loaded. Instead, it shows page "A"'s content and page "B"'s TitleView.

Steps to Reproduce

1. Create page "A" and "B" in a Navigation-style App project.
2. For page "A"'s TitleView, add a ScrollView and some controls within it.
3. For page "B"'s TitleView, add some controls within it.
4. Add a button to navigate from "A" to "B".
5. Build and run, navigate from "A" to "B", then navigate back. See if the TitleView is normally loaded.

Expected Behavior

When navigating back from "B" to "A", "A"'s TitleView should be loaded.

Actual Behavior

"B"'s TitleView is still there.

Basic Information

• Version with issue: All recent Xamarin.Forms version, including latest pre-release.
• Last known good version: Not known.
• IDE: Visual Studio 2019
• Platform Target Frameworks:
  • UWP: All recent Windows SDK versions, including latest pre-release.
• Nuget Packages: Xamarin.Forms 4.4 ~ latest pre-release, as far as I know.
• Affected Devices: Only UWP.

Workaround

Not known.

Thanks.

[samhouts]

Can you please attach a small project that demonstrates this issue? Thanks!

[SunshineSpring666]

Hi, please check the following Demo link, when navigating by tapping the listitem to the detail page, the TitleView is normal. However, when navigating back, we need to tap twice the back button, and the TitleView of List Page is not shown. Thanks!

TitleViewScrollBug.zip

[SunshineSpring666]

Any progress on this issue? I see the bug still exist in the latest release. Thanks.

[SunshineSpring666]

Hi. I checked this bug on Xamarin.Forms 5.0.0. The issue still exists. Any plan on fixing it? Thanks. Have a nice day.

[SunshineSpring666]

Since this issue still exist in latest version, I made a simple demo project as attachment to this bug report. ScrollViewInTitleViewNavigation.zip