[Bug] iOS - CollectionView MeasureAll fails with a heterogeneous item source

[WanftMoon]

Description

When setting the ItemsSource of a CollectionView with an heterogeneous list (int, datetime and string for example), CollectionView Fails on iOS to MeasureAllItems and resize the cell accordingly.

Steps to Reproduce

1. Create a collectionView with the SizingStrategy MeasureAllItems and set the ItemsSource to a list like below:
   <x:Array Type="{x:Type x:Object}"> <sys:DateTime>2001-12-01</sys:DateTime> <sys:DateTime>2006-06-21</sys:DateTime> <sys:Int32>98</sys:Int32> <sys:String>Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon Baboon</sys:String> <sys:String>Goodbye</sys:String> <sys:Int32>98</sys:Int32> <sys:String>Baboon </sys:String> <sys:Int32>98</sys:Int32> </x:Array>

2. Set the datatemplate
   <DataTemplate> <Label Text="{Binding .}" /> </DataTemplate>

3. Run it on iOS and Android.

Expected Behavior

The item to be of the correct size

Actual Behavior

On Android, the it behaves correct.
On iOS, the list will keep the height of the greater item, after it is rendered

Basic Information

• Version with issue: XF 4.8.0.1560
• Last known good version: NA
• IDE: Visual Studio For mac
• Platform Target Frameworks:
  • iOS: 14.1
  • Android: 9.0
• Nuget Packages:

• Affected Devices: iOS

Screenshots

Reproduction Link

CollectionViewMeasureAll.zip

Workaround

Don't use heterogeneous item source for now

[PureWeen]

Duplicate #11011

[WanftMoon]

@PureWeen @samhouts
Can you link the duplicate issue?

[PureWeen]

Apologies @WanftMoon I meant to link
#11011

There are a number of issues logged against MeasureAll

#12622
#11511

So just trying to consolidate

[WanftMoon]

ty, will follow those issues!

best regards.