Display Bug On iOS about BoxView that under initial InVisible Layout

[maonaoda]

Description

Each element of Options has an underline at the bottom。

• When options are initially displayed (IsVisable=True), the display is correct, as shown in the red box in the following image:
  　①、②、③

• When I Tapped the On RadioButton，the underline in options was not shown at all.

• But when I bring the app back to the foreground from the background, or scroll the CollectionView, the underline reappears.
  I suspect that iOS is not rendering in time.
  

• When I keep updating the selection of RadioButton and scrolling CollectionView, there is a probability that all option elements are covered together.
  

This is obviously a very serious display problem.

Steps to Reproduce

No response

Link to public reproduction project repository

https://github.com/maonaoda/MauiDisplayBugOnIOS

Version with bug

8.0.40 SR5

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms, Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

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• BindableLayout placed inside Border does not render elements correctly on iOS. (#15025), similarity score: 0.76
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Closed similar issues:

• Elements in same layout doesn't response IsVisible changes [iOS][Mac] (#7482), similarity score: 0.73

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[maonaoda]

Is it because the BoxView width is not set?

[maonaoda]

Or Binding the isVisible param to Boxview

[ninachen03]

Verified this issue with Visual Studio 17.11.0 Preview 1.1(8.0.40) can repro it but(8.0.21 &8.0.3) cannot repro.

[maonaoda]

temp workaround:

1. Set an explicit size to BoxView

2. Bind the IsVisible of the parent to BoxView as well
   (After Fix BoxView not rendering when is hidden on start #21960 Merged)
   or

                    BoxViewHandler.Mapper.ReplaceMapping<BoxView, BoxViewHandler>(nameof(BoxView.IsVisible), (handler, boxView) =>
                    {
                        BoxViewHandler.MapShape(handler, boxView);
                        BoxViewHandler.MapBackground(handler, boxView);
                    });