[Bug] Scroll position issues with CollectionView when inside RefreshView

[dsdilpreet]

Description

When RemainingItemsThreshold is reached for CollectionView which is wrapped inside RefreshView, scroll position resets automatically to top.

Steps to Reproduce

1. Open the attached Github project in Visual Studio
2. Run it on an iOS emulator or device
3. Scroll items and scroll bar should automatically reset to top when items remaining threshold is reached for collection view

Expected Behavior

Scroll position should not reset to top

Actual Behavior

Scroll position resets and first item in list is visible when remaining item threshold is reached on iOS but it stays where it needs to on Android

Basic Information

• Version with issue: 4.6.0.726
• IDE: Visual Studio 2019 v16.5.4
• Platform Target Frameworks:
  • iOS: 13.4 and 12.4

Screenshots

iPhone 11 iOS 13.4 2020-05-11 10-52-39.zip

Reproduction Link

https://github.com/dsdilpreet/Xamarin_Forms___RefreshView_Demo_ScrollBarIssue

[jsuarezruiz]

Could it be related with #8306

[Serena247Pro]

Any workaround for this issue? Facing the exactly same situation....

[Bmk-markuplab]

Is there any fix other than disabling pull to refresh? I want to use CollectionView inside RefreshView. Pull to refresh is required.
The issue is not generated due to hitting the threshold. Even the threshold not hit, if the itemsouce contain more items than fit in full display the issue will appear

[Phenek]

Hey,
just don't use the same boolean for refreshView command and LoadMore command.
Changing the IsRefreshing boolean to false has the behavior to scroll to top on iOS.
It is an understandable behavior.