[Problem/Bug]: Narrator Left Arrow jumps to end of WebView2 content instead of previous elemen

What happened?

When using Narrator in WebView2 content on Windows ARM64, pressing Left Arrow while focused on the first element causes Narrator to incorrectly jump to the last element in the document, instead of staying on the first element or doing nothing. This creates unexpected circular navigation behavior.

Importance

Moderate. My app's user experience is affected, but still usable.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

143.0.3650.80 (arm64)

SDK Version

9.0.303

Framework

WinUI3/WinAppSDK

Operating System

Windows 11

OS Version

Version 10.0.26100 Build 26100

Repro steps

When a Narrator user navigates into WebView2 content:

1. User presses Tab to enter WebView2 → Focus lands on first element
2. User navigates forward with Right Arrow → Moves to next elements
3. User navigates back with Left Arrow → Works correctly for middle/end elements
4. BUG: When user is on the FIRST element and presses Left Arrow, Narrator jumps to the LAST element.

This creates unexpected "wrap-around" navigation that disorients screen reader users.

Expected Behavior

When user presses Left Arrow while on the first element in WebView2:

Option 1 (Preferred):

• Narrator should stay on the first element (no navigation)
• Similar to how reaching the end works in most documents

Option 2 (Acceptable):

• Narrator could play a boundary sound/announcement
• But should NOT jump to last element

Repros in Edge Browser

Yes, issue can be reproduced in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

No response

No repository files, tests, or entry points are mentioned. Start by reproducing the issue on Windows 11 ARM64 with WebView2 Runtime 143.0.3650.80 and compare the corresponding Edge version. The issue is done when Left Arrow at the first element no longer wraps to the last element.