diff --git a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
index ddbccd3a27d..b44ec9fa0a0 100644
--- a/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
+++ b/extensions/typescript-language-features/src/features/bufferSyncSupport.ts
@@ -256,6 +256,7 @@ export default class BufferSyncSupport extends Disposable {
 		if (!syncedBuffer) {
 			return;
 		}
+		this.pendingDiagnostics.delete(resource);
 		this.syncedBuffers.delete(resource);
 		syncedBuffer.close();
 		if (!fs.existsSync(resource.fsPath)) {
@@ -264,6 +265,19 @@ export default class BufferSyncSupport extends Disposable {
 		}
 	}
 
+	public interuptGetErr<R>(f: () => R): R {
+		console.log('try inter');
+		if (!this.pendingGetErr) {
+			return f();
+		}
+
+		this.pendingGetErr.cancel();
+		this.pendingGetErr = undefined;
+		const result = f();
+		this.triggerDiagnostics();
+		return result;
+	}
+
 	private onDidCloseTextDocument(document: vscode.TextDocument): void {
 		this.closeResource(document.uri);
 	}
diff --git a/extensions/typescript-language-features/src/features/completions.ts b/extensions/typescript-language-features/src/features/completions.ts
index e1eb9121f13..063bd8cbbc6 100644
--- a/extensions/typescript-language-features/src/features/completions.ts
+++ b/extensions/typescript-language-features/src/features/completions.ts
@@ -304,7 +304,7 @@ class TypeScriptCompletionItemProvider implements vscode.CompletionItemProvider
 			return null;
 		}
 
-		await this.fileConfigurationManager.ensureConfigurationForDocument(document, token);
+		await this.client.interuptGetErr(() => this.fileConfigurationManager.ensureConfigurationForDocument(document, token));
 
 		const args: Proto.CompletionsRequestArgs = {
 			...typeConverters.Position.toFileLocationRequestArgs(file, position),
@@ -313,19 +313,18 @@ class TypeScriptCompletionItemProvider implements vscode.CompletionItemProvider
 			triggerCharacter: context.triggerCharacter as Proto.CompletionsTriggerCharacter
 		};
 
-
 		let enableCommitCharacters = true;
 		let msg: ReadonlyArray<Proto.CompletionEntry> | undefined = undefined;
 		try {
 			if (this.client.apiVersion.gte(API.v300)) {
-				const { body } = await this.client.execute('completionInfo', args, token);
+				const { body } = await this.client.interuptGetErr(() => this.client.execute('completionInfo', args, token));
 				if (!body) {
 					return null;
 				}
 				enableCommitCharacters = !body.isNewIdentifierLocation;
 				msg = body.entries;
 			} else {
-				const { body } = await this.client.execute('completions', args, token);
+				const { body } = await this.client.interuptGetErr(() => this.client.execute('completions', args, token));
 				if (!body) {
 					return null;
 				}
diff --git a/extensions/typescript-language-features/src/features/hover.ts b/extensions/typescript-language-features/src/features/hover.ts
index 78580d3dfdc..19f78ee5f33 100644
--- a/extensions/typescript-language-features/src/features/hover.ts
+++ b/extensions/typescript-language-features/src/features/hover.ts
@@ -25,9 +25,10 @@ class TypeScriptHoverProvider implements vscode.HoverProvider {
 		if (!filepath) {
 			return undefined;
 		}
+
 		const args = typeConverters.Position.toFileLocationRequestArgs(filepath, position);
 		try {
-			const { body } = await this.client.execute('quickinfo', args, token);
+			const { body } = await this.client.interuptGetErr(() => this.client.execute('quickinfo', args, token));
 			if (body) {
 				return new vscode.Hover(
 					TypeScriptHoverProvider.getContents(body),
diff --git a/extensions/typescript-language-features/src/typescriptService.ts b/extensions/typescript-language-features/src/typescriptService.ts
index 990ab8c6384..aff38d6a44c 100644
--- a/extensions/typescript-language-features/src/typescriptService.ts
+++ b/extensions/typescript-language-features/src/typescriptService.ts
@@ -91,4 +91,9 @@ export interface ITypeScriptServiceClient {
 	executeWithoutWaitingForResponse(command: 'reloadProjects', args: null): void;
 
 	executeAsync(command: 'geterr', args: Proto.GeterrRequestArgs, token: vscode.CancellationToken): Promise<any>;
+
+	/**
+	 * Cancel on going geterr requests and re-queue them after `f` has been evaluated.
+	 */
+	interuptGetErr<R>(f: () => R): R;
 }
\ No newline at end of file
diff --git a/extensions/typescript-language-features/src/typescriptServiceClient.ts b/extensions/typescript-language-features/src/typescriptServiceClient.ts
index 2d20a3c0a64..016f533b6e2 100644
--- a/extensions/typescript-language-features/src/typescriptServiceClient.ts
+++ b/extensions/typescript-language-features/src/typescriptServiceClient.ts
@@ -738,6 +738,10 @@ export default class TypeScriptServiceClient extends Disposable implements IType
 		return result;
 	}
 
+	public interuptGetErr<R>(f: () => R): R {
+		return this.bufferSyncSupport.interuptGetErr(f);
+	}
+
 	/**
 	 * Given a `errorText` from a tsserver request indicating failure in handling a request,
 	 * prepares a payload for telemetry-logging.