diff --git a/_extension/src/telemetryReporting.ts b/_extension/src/telemetryReporting.ts
index 86d16ac6061..62ce5bd1d2f 100644
--- a/_extension/src/telemetryReporting.ts
+++ b/_extension/src/telemetryReporting.ts
@@ -62,6 +62,7 @@ export type LSErrorResponse = {
     errorCode: string;
     requestMethod: string;
     stack: string;
+    fileExtension?: string;
 };
 
 export type EnableNativePreview = {};
diff --git a/internal/lsp/lsproto/_generate/generate.mts b/internal/lsp/lsproto/_generate/generate.mts
index e01566d6f80..35c5d02e719 100755
--- a/internal/lsp/lsproto/_generate/generate.mts
+++ b/internal/lsp/lsproto/_generate/generate.mts
@@ -211,6 +211,12 @@ const customStructures: Structure[] = [
                 type: { kind: "base", name: "string" },
                 documentation: "The stack trace associated with the event.",
             },
+            {
+                name: "fileExtension",
+                type: { kind: "base", name: "string" },
+                optional: true,
+                documentation: "The file extension of the document that caused the event, if available.",
+            },
         ],
         documentation: "RequestFailureTelemetryProperties contains failure information when an LSP request manages to recover.",
     },
diff --git a/internal/lsp/lsproto/lsp_generated.go b/internal/lsp/lsproto/lsp_generated.go
index 6cfef994de3..f1aa618bb13 100644
--- a/internal/lsp/lsproto/lsp_generated.go
+++ b/internal/lsp/lsproto/lsp_generated.go
@@ -21964,6 +21964,9 @@ type RequestFailureTelemetryProperties struct {
 
 	// The stack trace associated with the event.
 	Stack string `json:"stack"`
+
+	// The file extension of the document that caused the event, if available.
+	FileExtension *string `json:"fileExtension,omitzero"`
 }
 
 var _ json.UnmarshalerFrom = (*RequestFailureTelemetryProperties)(nil)
@@ -22005,6 +22008,10 @@ func (s *RequestFailureTelemetryProperties) UnmarshalJSONFrom(dec *json.Decoder)
 			if err := json.UnmarshalDecode(dec, &s.Stack); err != nil {
 				return err
 			}
+		case `"fileExtension"`:
+			if err := json.UnmarshalDecode(dec, &s.FileExtension); err != nil {
+				return err
+			}
 		default:
 			// Ignore unknown properties.
 		}
diff --git a/internal/lsp/server.go b/internal/lsp/server.go
index 8519928c8a6..3fa40d06287 100644
--- a/internal/lsp/server.go
+++ b/internal/lsp/server.go
@@ -756,8 +756,9 @@ func registerLanguageServiceDocumentRequestHandler[Req lsproto.HasTextDocumentUR
 		if err != nil {
 			return nil, err
 		}
+		fileExtension := tspath.TryGetExtensionFromPath(params.TextDocumentURI().FileName())
 		return func() error {
-			defer s.recover(req)
+			defer s.recover(req, fileExtension)
 			resp, lsErr := fn(s, ctx, ls, params)
 			if lsErr != nil {
 				return lsErr
@@ -781,8 +782,9 @@ func registerLanguageServiceWithAutoImportsRequestHandler[Req lsproto.HasTextDoc
 		if err != nil {
 			return nil, err
 		}
+		fileExtension := tspath.TryGetExtensionFromPath(params.TextDocumentURI().FileName())
 		return func() error {
-			defer s.recover(req)
+			defer s.recover(req, fileExtension)
 			resp, lsErr := fn(s, ctx, languageService, params)
 			if errors.Is(lsErr, ls.ErrNeedsAutoImports) {
 				languageService, lsErr = s.session.GetLanguageServiceWithAutoImports(ctx, snapshot, params.TextDocumentURI())
@@ -824,8 +826,9 @@ func registerMultiProjectReferenceRequestHandler[Req lsproto.HasTextDocumentPosi
 		if err != nil {
 			return nil, err
 		}
+		fileExtension := tspath.TryGetExtensionFromPath(params.TextDocumentURI().FileName())
 		return func() error {
-			defer s.recover(req)
+			defer s.recover(req, fileExtension)
 			resp, lsErr := fn(defaultLs, ctx, params, orchestrator)
 			if lsErr != nil {
 				return lsErr
@@ -882,7 +885,7 @@ func (s *Server) getLanguageServiceAndCrossProjectOrchestrator(ctx context.Conte
 	return defaultLs, orchestrator, err
 }
 
-func (s *Server) recover(req *lsproto.RequestMessage) {
+func (s *Server) recover(req *lsproto.RequestMessage, fileExtension string) {
 	if r := recover(); r != nil {
 		stack := debug.Stack()
 		s.logger.Errorf("panic handling request %s: %v\n%s", req.Method, r, string(stack))
@@ -892,13 +895,17 @@ func (s *Server) recover(req *lsproto.RequestMessage) {
 				return
 			}
 
+			props := &lsproto.RequestFailureTelemetryProperties{
+				ErrorCode:     lsproto.ErrorCodeInternalError.String(),
+				RequestMethod: strings.ReplaceAll(string(req.Method), "/", "."),
+				Stack:         sanitizeStackTrace(string(stack)),
+			}
+			if fileExtension != "" {
+				props.FileExtension = &fileExtension
+			}
 			_ = sendNotification(s, lsproto.TelemetryEventInfo, lsproto.TelemetryEvent{
 				RequestFailureTelemetryEvent: &lsproto.RequestFailureTelemetryEvent{
-					Properties: &lsproto.RequestFailureTelemetryProperties{
-						ErrorCode:     lsproto.ErrorCodeInternalError.String(),
-						RequestMethod: strings.ReplaceAll(string(req.Method), "/", "."),
-						Stack:         sanitizeStackTrace(string(stack)),
-					},
+					Properties: props,
 				},
 			})
 		} else {
@@ -1245,7 +1252,7 @@ func (s *Server) handleCompletionItemResolve(ctx context.Context, params *lsprot
 	if err != nil {
 		return nil, err
 	}
-	defer s.recover(reqMsg)
+	defer s.recover(reqMsg, tspath.TryGetExtensionFromPath(data.FileName))
 	return languageService.ResolveCompletionItem(
 		ctx,
 		params,
@@ -1282,7 +1289,7 @@ func (s *Server) handleDocumentOnTypeFormat(ctx context.Context, ls *ls.Language
 
 func (s *Server) handleWorkspaceSymbol(ctx context.Context, params *lsproto.WorkspaceSymbolParams, reqMsg *lsproto.RequestMessage) (lsproto.WorkspaceSymbolResponse, error) {
 	snapshot := s.session.GetSnapshotLoadingProjectTree(ctx, nil)
-	defer s.recover(reqMsg)
+	defer s.recover(reqMsg, "")
 
 	programs := core.Map(snapshot.ProjectCollection.Projects(), (*project.Project).GetProgram)
 	return ls.ProvideWorkspaceSymbols(
@@ -1336,7 +1343,7 @@ func (s *Server) handleCodeLensResolve(ctx context.Context, codeLens *lsproto.Co
 		// based on non-existent files and line maps from shortened files.
 		return codeLens, lsproto.ErrorCodeContentModified
 	}
-	defer s.recover(reqMsg)
+	defer s.recover(reqMsg, tspath.TryGetExtensionFromPath(codeLens.Data.Uri.FileName()))
 	return defaultLs.ResolveCodeLens(
 		ctx,
 		codeLens,