fix #13363

src/vs/workbench/services/textfile/common/textFileEditorModelManager.ts

@@ -65,8 +65,9 @@ export class TextFileEditorModelManager implements ITextFileEditorModelManager {
 
 	private registerListeners(): void {
 
-		// Editors changing
+		// Editors changing/closing
 		this.toUnbind.push(this.editorGroupService.onEditorsChanged(() => this.onEditorsChanged()));
+		this.toUnbind.push(this.editorGroupService.getStacksModel().onEditorClosed(() => this.onEditorClosed()));
 
 		// File changes
 		this.toUnbind.push(this.eventService.addListener2('files.internal:fileChanged', (e: LocalFileChangeEvent) => this.onLocalFileChange(e)));
@@ -80,6 +81,10 @@ export class TextFileEditorModelManager implements ITextFileEditorModelManager {
 		this.disposeUnusedModels();
 	}
 
+	private onEditorClosed(): void {
+		this.disposeUnusedModels();
+	}
+
 	private disposeModelIfPossible(resource: URI): void {
 		const model = this.get(resource);
 		if (this.canDispose(model)) {