When continously scrolling down, ItemsRepeater starts 'jumping' back and forth in the list

[Phranky]

Describe the bug
I have 2 nested ItemsRepeaters with different scroll directions (outer list: vertical; inner list: horizontal) to display a hierarchical list of data. When I press and hold the down-arrow key on the keyboard or the D-pad down key on the Xbox-controller the focus is moved down through the vertical lists but at one point starts jumping back to the top of the list and continues to move down until it jumps up again.

I already filed this bug earlier (please see: #853) and it was marked as fixed but I'm still able to reproduce the issue.

A demo app to reproduce the issue can be found here: https://github.com/Phranky/ItemsRepeaterDemo

Steps to reproduce the bug

Steps to reproduce the behavior:

1. Download the attached demo app
2. compile it and deploy it to a Xbox One and run it
3. press and hold the down-arrow key on the keyboard or the D-pad down key on the Xbox controller
4. watch the scrolling behavior

Expected behavior
fast de-virtualization and smooth scrolling

Screenshots

Version Info

• WinUI NuGet package version:
• OS version(s): PC: 10.0.18326.295, XboxOne S: 10.0.18362.6065
• and form factor(s): any

NuGet package version:
Microsoft.UI.Xaml 2.2.190830001

Windows 10 version	Saw the problem?
May 2019 Update (18362)	Yes
October 2018 Update (17763)
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)

Device form factor	Saw the problem?
Desktop	Yes
Mobile
Xbox	Yes
Surface Hub
IoT

Additional context
Please try to reproduce the issue using the following demo app: https://github.com/Phranky/ItemsRepeaterDemo

[jevansaks]

We should probably just re-open the old issue in the future but since this is here it's fine. :) @ranjeshj can you take a look?

[marcelwgn]

@Phranky Can you share a video of this issue? I tried the repo app on my machine and the scrolling seemed to behave correctly.

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 5 days.