[Bug] [iOS] Shell Tab bar rendering delay when using Shell.SendBackButtonPressed();

[bhuvan94]

Description

• After Xamarin forms Update i'm facing delay in rendering the Shell Tab Bar. I'm Using Shell.SenBackButtonPressed() for Back navigation. I have attached sample for you reference

Steps to Reproduce

1. Open attached sample and run in iOS
2. Go to Browse Tab.
3. Click List item will navigate to Item Detail Page. (Here Tab bar is Hidden).
4. Press Back button inside the page. (Note : not navigation back button. press red background back button)
5. Now you can see delay in rendering the Tab Bar

Expected Behavior

There won't be any delay when navigate back .

Actual Behavior

Delay in rendering the Tab Bar on Navigation back.

Basic Information

• Version with issue: 4.7.0.1260
• Last known good version:
• IDE:
• Platform Target Frameworks:
  • iOS: 13.2.2
  • Android: NA
  • UWP: NA
• Android Support Library Version:
• Nuget Packages:
• Affected Devices: iPhone 11

Screenshots

Reproduction Link

Please find the sample here : TestShell.zip

Workaround

Couldn't find any workaround.

[jsuarezruiz]

The behavior:

[jsuarezruiz]

Could be fixed by https://github.com/xamarin/Xamarin.Forms/pull/12320 The Tab must be updated sooner https://github.com/xamarin/Xamarin.Forms/pull/12320/files#diff-0e1f6e3de5cf8452807b17c76523d948R348

[bhuvan94]

Hi @jsuarezruiz ,

Is there any workaround available ?

[returnZro]

Could be fixed by #12320 The Tab must be updated sooner https://github.com/xamarin/Xamarin.Forms/pull/12320/files#diff-0e1f6e3de5cf8452807b17c76523d948R348

Hi @jsuarezruiz , I tested with #12320 , it did not resolve the issue. There is still same duration of delay in rendering the bottom bars.

[bhuvan94]

Hi @jsuarezruiz , any update on this ?

[jm-parent]

Same here ;)

And my client is waiting for a fix/workaround too 😩

[vandriot]

Hi @jsuarezruiz, could we please have an update on this issue? Thanks!