diff --git a/news/2 Fixes/9096.md b/news/2 Fixes/9096.md
new file mode 100644
index 000000000000..394e9660e87b
--- /dev/null
+++ b/news/2 Fixes/9096.md	
@@ -0,0 +1 @@
+Fix issue that prevented language server diagnostics from being published.
diff --git a/src/client/activation/languageServer/languageClientMiddleware.ts b/src/client/activation/languageServer/languageClientMiddleware.ts
index 5af9e4768e28..9c0334efeaf0 100644
--- a/src/client/activation/languageServer/languageClientMiddleware.ts
+++ b/src/client/activation/languageServer/languageClientMiddleware.ts
@@ -58,6 +58,7 @@ export class LanguageClientMiddleware implements Middleware {
     private connected = false; // Default to not forwarding to VS code.
 
     public constructor(private readonly surveyBanner: IPythonExtensionBanner) {
+        this.handleDiagnostics = this.handleDiagnostics.bind(this); // VS Code calls function without context.
     }
 
     public connect() {