diff --git a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
index e730f8e8be6..25ffb4c81bd 100644
--- a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
+++ b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
@@ -470,20 +470,20 @@ export default class BufferSyncSupport extends Disposable {
 	private sendPendingDiagnostics(): void {
 		const orderedFileSet = this.pendingDiagnostics.getOrderedFileSet();
 
+		if (this.pendingGetErr) {
+			this.pendingGetErr.cancel();
+
+			for (const file of this.pendingGetErr.files.entries) {
+				orderedFileSet.set(file.resource, undefined);
+			}
+		}
+
 		// Add all open TS buffers to the geterr request. They might be visible
 		for (const buffer of this.syncedBuffers.values) {
 			orderedFileSet.set(buffer.resource, undefined);
 		}
 
 		if (orderedFileSet.size) {
-			if (this.pendingGetErr) {
-				this.pendingGetErr.cancel();
-
-				for (const file of this.pendingGetErr.files.entries) {
-					orderedFileSet.set(file.resource, undefined);
-				}
-			}
-
 			const getErr = this.pendingGetErr = GetErrRequest.executeGetErrRequest(this.client, orderedFileSet, () => {
 				if (this.pendingGetErr === getErr) {
 					this.pendingGetErr = undefined;