Hi,
When I try and pick a form the list of forms instantly disappears, so I am unable to select.
When I click on the arrow to choose a form, the list appears for a fraction of a second and is then gone again.
Other people in my team have no issues, and I have had no issues either up until yesterday.
I think it coincided with the latest update but that may just be a coincidence.
Dear @peter.harrison,
Thank you for the report! We're looking into solutions to this issue, but it looks like a major issue on Microsoft's side with the latest update of WebView2, all dropdowns have stopped working 
This affects all products in Windows 11 using this tech, not just our Forms.
No easy fix at the moment, until Microsoft releases an update, though we're looking into all possible alternatives if it's not patched up quickly.
Seems like the issue has been identified and a fix is coming on Thursday 3/13 - [Problem/Bug]: input field of type text and name email loses focus · Issue #5144 · MicrosoftEdge/WebView2Feedback · GitHub
A fix should be available shortly:
134.0.3124.68, with the fix, should be available*. Could folks give it a try?
*We released it to a smaller population, so not everyone will have that build available. We will release it more broadly today soon after we get a few confirmations that it fixes things.
Soon, it should be updated for all users , but if you want to force an update, you can download an installer from here Microsoft Edge WebView2 | Microsoft Edge Developer and run it as an administrator.