[Problem/Bug]: WebView COREWEBVIEW2_HOSTING_MODE_WINDOW_TO_VISUAL causing Drag and Drop not to work

[klarenzPDE]

What happened?

Our application uses react-dnd (https://react-dnd.github.io/react-dnd/about) for our Drag & Drop which works well on all browsers and also works on MS addins (Excel & Word). But when we applied this fix: #5444 (comment) for another issue, the Drag & Drop suddenly stopped working.

We confirmed that removing this env variables will make the Drag & Drop work again.

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

143.0.3650.96

SDK Version

1.0.3485.44

Framework

----Please select----

Operating System

Windows 11

OS Version

26200.7462

Repro steps

I made a simple application that can run inside an addin:
addin_with_dnd_sandbox.xml

Using this application, you can easily add/remove the COREWEBVIEW2_FORCED_HOSTING_MODE variables and see how will the drag & drop will behave.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

[4tti]

Any update?