Make sure we always reset bufferSyncSupport when the TS server is started

Splits `reset` from `reinitialize` and makes sure we always `resset` buffer sync support when the service starts

extensions/typescript-language-features/src/features/bufferSyncSupport.ts

@@ -401,7 +401,10 @@ export default class BufferSyncSupport extends Disposable {
 		this.pendingGetErr?.cancel();
 		this.pendingDiagnostics.clear();
 		this.synchronizer.reset();
+	}
 
+	public reinitialize(): void {
+		this.reset();
 		for (const buffer of this.syncedBuffers.allBuffers) {
 			buffer.open();
 		}

extensions/typescript-language-features/src/typeScriptServiceClientHost.ts

@@ -182,8 +182,6 @@ export default class TypeScriptServiceClientHost extends Disposable {
 
 	private populateService(): void {
 		this.fileConfigurationManager.reset();
-		this.client.bufferSyncSupport.reset();
-		this.client.bufferSyncSupport.requestAllDiagnostics();
 
 		// See https://github.com/Microsoft/TypeScript/issues/5530
 		vscode.workspace.saveAll(false).then(() => {

extensions/typescript-language-features/src/typescriptServiceClient.ts

@@ -465,6 +465,8 @@ export default class TypeScriptServiceClient extends Disposable implements IType
 	}
 
 	private serviceStarted(resendModels: boolean): void {
+		this.bufferSyncSupport.reset();
+
 		const configureOptions: Proto.ConfigureRequestArguments = {
 			hostInfo: 'vscode',
 			preferences: {
@@ -476,6 +478,8 @@ export default class TypeScriptServiceClient extends Disposable implements IType
 		this.setCompilerOptionsForInferredProjects(this._configuration);
 		if (resendModels) {
 			this._onResendModelsRequested.fire();
+			this.bufferSyncSupport.reinitialize();
+			this.bufferSyncSupport.requestAllDiagnostics();
 		}
 
 		// Reconfigure any plugins