Switching between single screen and multi screen RDP on high DPI causes black window and unresponsive machine

Description
When opening some WPF apps (each containing single instance WebView component) on one machine (single screen) and then connecting from another machine (dual screen) over RDP in high DPI, when launching a new instance it results in a black window and the whole machine becomes unresponsive (dragging windows visual artefacts etc.).

Version
SDK: 1.0.774.44
Runtime: Edge 89
Framework: WPF
OS: Win10

Repro Steps
I can repro easily every time using mac OSX remote desktop.

1. Connect to windows machine with OSX RDP (single screen) with "Optimize for Retina Displays" turned on.
2. Open a number of instances of a WPF app each one navigated to different url.
3. Disconnect from RDP and reconnect to same machine from dual screen setup ("Optimize for Retina Displays" turned on)
4. Launch a new instance of the WPF app the window is black and whole machine becomes unresponsive (dragging windows visual artefacts etc.) until that process is killed.

n.b. Does not happen with "Optimize for Retina Displays" turned off (i.e. standard DPI).

A far from ideal workaround I have at the moment is to disable dpiAware in WPF manifest but results in a blurry view and obviously cannot get high DPI support.

AB#32898337

Reproduce the WPF app scenario using macOS RDP, switching from a single-screen to dual-screen high-DPI session with Optimize for Retina Displays enabled. Compare the behavior with standard DPI and the dpiAware-disabled workaround; done means a new WebView instance opens without a black window or making the machine unresponsive.