[Problem/Bug]: Select Control doesn't work on some computers

What happened?

Doesn't work even with a super basic HTML page. No console or javascript errors. Seems to be somewhat inconsistent as on a production page some drop downs work and some don't.

For the test HTML page source code see the first comment in this post.

Computer is running:
Windows 11 build 10.0.26100.4061
Edge 136.0.3240.92

Troubleshooting steps attempted:

• Repairing Edge (this did not fix things)
• Cleared site cookies/cache (did not fix things)
• Incognito Window (did not fix things)

Current Work-Around:
Currently as a work-around we loading the impacted site using IE compatibility mode. Obviously this is not a good long term solution.

Importance

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

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

136.0.3240.92

SDK Version

No response

Framework

Other

Operating System

Windows 11

OS Version

10.0.26100.4061

Repro steps

We have not been able to reproduce the issue on another computer so far, but we are actively trying to replicate the issue. So far only one device has been impacted, and the problem is easily reproduced on the impacted machine.

We were notified of the issue on May 27th, 2025.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Regression in newer Runtime

Last working version (if regression)

unsure, but prior to May 27 it did work