Opening a PR link from chat in Agents window sometimes fails

[ulugbekna]

Repro:

Not sure how to repro because some PRs do open.

1. click on PR link
2. empty PR view opens and I see this error:

[GitHub.vscode-pull-request-github]Cannot read properties of undefined (reading 'onDidChangeActiveIssue')
$onExtensionRuntimeError @ mainThreadExtensionService.ts:79
_doInvokeHandler @ rpcProtocol.ts:458
_invokeHandler @ rpcProtocol.ts:443
_receiveRequest @ rpcProtocol.ts:370
_receiveOneMessage @ rpcProtocol.ts:297
(anonymous) @ rpcProtocol.ts:159
_deliver @ event.ts:1391
fire @ event.ts:1422
fire @ ipc.net.ts:658
(anonymous) @ localProcessExtensionHost.ts:438
mainThreadExtensionService.ts:80 TypeError: Cannot read properties of undefined (reading 'onDidChangeActiveIssue')
	at new Ol (vscode-file://vscode-app/Users/ulugbekna/.vscode-insiders/extensions/github.vscode-pull-request-github-0.165.2026090413/dist/extension.js:3796:3218)
	at new rr (vscode-file://vscode-app/Users/ulugbekna/.vscode-insiders/extensions/github.vscode-pull-request-github-0.165.2026090413/dist/extension.js:3808:11588)
	at rr.createOrShow (vscode-file://vscode-app/Users/ulugbekna/.vscode-insiders/extensions/github.vscode-pull-request-github-0.165.2026090413/dist/extension.js:3808:12481)
	at Vd._openPullRequestWebview (vscode-file://vscode-app/Users/ulugbekna/.vscode-insiders/extensions/github.vscode-pull-request-github-0.165.2026090413/dist/extension.js:4168:3778)

CleanShot.2026-09-07.at.11.22.59.mp4

Version: 1.137.0-insider (Universal)
Commit: de8cc55
Date: 2026-09-04T15:53:39Z
Electron: 42.10.0
ElectronBuildId: 15109253
Chromium: 148.0.7778.280
Node.js: 24.18.1
V8: 14.8.178.38-electron.0
@github/copilot: 1.0.83-2
@github/copilot-sdk: 1.0.13-preview.4
OS: Darwin arm64 25.6.0