[Bug] CollectionView adds extra white space at the end of the scroll if we use VerticalItemSpacing on the ItemsLayout

[hyper-venom]

Description

If we specify vertical item space for the collectionview, it will add additional white space at the end of items rendered by the collectionview. And the amount of white space is proportional to the no of items in the collection views itemsource.

Steps to Reproduce

1. Add a collection view to the page
2. Define VerticalItemSpacing for the layout, say GridItemsLayout
3. Set ItemsSource

More the no of the item in the collection view, more the white space at the end.

Expected Behavior

VerticalItemSpacing should only add spacing among the items present in the collection

Actual Behavior

Additional white space is added after rendering the ItemsSource items, as the no of items increase the amount of white space at the end also increases.

Basic Information

• Version with issue: Xamarin Forms 4.5.0.657 & 4.3.0.991250 (tested on these two version)
• Last known good version:
• IDE: Visual Studio for mac
• Platform Target Frameworks:
  • iOS: 13.4.1(simulator), 12.4.4(iPhone 6 Plus device)
  • Android: Not observed in android
• Affected Devices: iPhone 11 (simulator), iPhone 6 Plus

  Screenshots

  Here there are around 14 items in the list, after scrolling to the end of the list this white space is present.

Workaround

One workaround was to not use the VerticalItemSpacing and instead include the vertical spacing within the data template. But the downfall of this approach is that if we wont be able to have a common template being used in different places

[hugotruffe79]

Hi I have the same problem.

The project has the last version of xamarin