diff --git a/src/lib/menu/menu-content.ts b/src/lib/menu/menu-content.ts
index e8d16b824ea5..2329777becb5 100644
--- a/src/lib/menu/menu-content.ts
+++ b/src/lib/menu/menu-content.ts
@@ -18,6 +18,7 @@ import {
 } from '@angular/core';
 import {TemplatePortal, DomPortalOutlet} from '@angular/cdk/portal';
 import {DOCUMENT} from '@angular/common';
+import {Subject} from 'rxjs';
 
 /**
  * Menu content that will be rendered lazily once the menu is opened.
@@ -29,6 +30,9 @@ export class MatMenuContent implements OnDestroy {
   private _portal: TemplatePortal<any>;
   private _outlet: DomPortalOutlet;
 
+  /** Emits when the menu content has been attached. */
+  _attached = new Subject<void>();
+
   constructor(
     private _template: TemplateRef<any>,
     private _componentFactoryResolver: ComponentFactoryResolver,
@@ -60,6 +64,7 @@ export class MatMenuContent implements OnDestroy {
     // risk it staying attached to a pane that's no longer in the DOM.
     element.parentNode!.insertBefore(this._outlet.outletElement, element);
     this._portal.attach(this._outlet, context);
+    this._attached.next();
   }
 
   /**
diff --git a/src/lib/menu/menu-trigger.ts b/src/lib/menu/menu-trigger.ts
index a099665a3b66..b2895608564a 100644
--- a/src/lib/menu/menu-trigger.ts
+++ b/src/lib/menu/menu-trigger.ts
@@ -245,9 +245,14 @@ export class MatMenuTrigger implements AfterContentInit, OnDestroy {
       if (menu.lazyContent) {
         // Wait for the exit animation to finish before detaching the content.
         menu._animationDone
-          .pipe(filter(event => event.toState === 'void'), take(1))
-          .subscribe(() => {
-            menu.lazyContent!.detach();
+          .pipe(
+            filter(event => event.toState === 'void'),
+            take(1),
+            // Interrupt if the content got re-attached.
+            takeUntil(menu.lazyContent._attached)
+          )
+          .subscribe(() => menu.lazyContent!.detach(), undefined, () => {
+            // No matter whether the content got re-attached, reset the menu.
             this._resetMenu();
           });
       } else {