CanvasSwapChainPanel redraw position issue in WinUI3 desktop app

[DHancock]

I'm using a CanvasSwapChainPanel control to make animations smother (worked perfectly). The trouble is that if I resize the window containing the control, the backing store isn't always drawn to the window in the correct position. It's sometimes offset from the origin. It's a bit variable and seem dependent on the size of the window, the smaller the window the more likely it is to go wrong. See the screen capture below.

I've written a minimal repro project:

SwapChainRedrawIssue.zip

It uses nuget packages:

• Project Reunion version 0.8.2
• Microsoft.Graphics.Win2D version 0.8.2.23

I'm running windows 21H1 (19043.1165) I doubt its a graphics card issue but it's integrated graphics i7-7500U

The repro project simply updates the swap chain on every resize event:

[DHancock]

Appears this is a generic swapchain issue and not part of Win2D. See:

microsoft/microsoft-ui-xaml#5888