diff --git a/client/src/app/core/core-services/openslides.service.ts b/client/src/app/core/core-services/openslides.service.ts
index 8d8bd7c8f..16e0568da 100644
--- a/client/src/app/core/core-services/openslides.service.ts
+++ b/client/src/app/core/core-services/openslides.service.ts
@@ -1,8 +1,6 @@
 import { Injectable } from '@angular/core';
 import { Router } from '@angular/router';
 
-import { take } from 'rxjs/operators';
-
 import { WebsocketService } from './websocket.service';
 import { OperatorService } from './operator.service';
 import { StorageService } from './storage.service';
@@ -122,18 +120,16 @@ export class OpenSlidesService {
         // is changed, the WS needs to reconnect, so the new connection holds the new
         // user information.
         if (this.websocketService.isConnected) {
-            this.websocketService.close();
-            // Wait for the disconnect.
-            await this.websocketService.closeEvent.pipe(take(1)).toPromise();
+            await this.websocketService.close();
         }
         this.websocketService.connect({ changeId: changeId }); // Request changes after changeId.
     }
 
     /**
-     * Shuts OpenSlides down. The websocket is closed and the operator is not set.
+     * Shuts down OpenSlides. The websocket connection is closed and the operator is not set.
      */
-    public shutdown(): void {
-        this.websocketService.close();
+    public async shutdown(): Promise<void> {
+        await this.websocketService.close();
         this._booted = false;
     }
 
@@ -141,7 +137,17 @@ export class OpenSlidesService {
      * Shutdown and bootup.
      */
     public async reboot(): Promise<void> {
-        this.shutdown();
+        await this.shutdown();
+        await this.bootup();
+    }
+
+    /**
+     * Clears the client cache and restarts OpenSlides. Results in "flickering" of the
+     * login mask, because the cached operator is also cleared.
+     */
+    public async reset(): Promise<void> {
+        await this.shutdown();
+        await this.storageService.clear();
         await this.bootup();
     }
 
diff --git a/client/src/app/core/core-services/websocket.service.ts b/client/src/app/core/core-services/websocket.service.ts
index 03cbfd625..d70a9bce6 100644
--- a/client/src/app/core/core-services/websocket.service.ts
+++ b/client/src/app/core/core-services/websocket.service.ts
@@ -3,6 +3,7 @@ import { MatSnackBar, MatSnackBarRef, SimpleSnackBar } from '@angular/material';
 import { Router } from '@angular/router';
 
 import { Observable, Subject } from 'rxjs';
+import { take } from 'rxjs/operators';
 import { TranslateService } from '@ngx-translate/core';
 
 import { formatQueryParams, QueryParams } from '../query-params';
@@ -293,12 +294,13 @@ export class WebsocketService {
     /**
      * Closes the websocket connection.
      */
-    public close(): void {
+    public async close(): Promise<void> {
         this.shouldBeClosed = true;
         this.dismissConnectionErrorNotice();
         if (this.websocket) {
             this.websocket.close();
             this.websocket = null;
+            await this.closeEvent.pipe(take(1)).toPromise();
         }
     }
 
diff --git a/client/src/app/site/common/components/legal-notice/legal-notice.component.html b/client/src/app/site/common/components/legal-notice/legal-notice.component.html
index 30b81be85..c4f4158c7 100644
--- a/client/src/app/site/common/components/legal-notice/legal-notice.component.html
+++ b/client/src/app/site/common/components/legal-notice/legal-notice.component.html
@@ -6,4 +6,10 @@
 
 <os-legal-notice-content></os-legal-notice-content>
 
+<mat-card class="os-card">
+    <button type="button" mat-button (click)="resetCache()">
+        <span translate>Reset cache</span>
+    </button>
+</mat-card>
+
 <os-count-users></os-count-users>
diff --git a/client/src/app/site/common/components/legal-notice/legal-notice.component.ts b/client/src/app/site/common/components/legal-notice/legal-notice.component.ts
index 387297c85..6408145ab 100644
--- a/client/src/app/site/common/components/legal-notice/legal-notice.component.ts
+++ b/client/src/app/site/common/components/legal-notice/legal-notice.component.ts
@@ -1,9 +1,14 @@
 import { Component } from '@angular/core';
+import { OpenSlidesService } from 'app/core/core-services/openslides.service';
 
 @Component({
     selector: 'os-legal-notice',
     templateUrl: './legal-notice.component.html'
 })
 export class LegalNoticeComponent {
-    public constructor() {}
+    public constructor(private openSlidesService: OpenSlidesService) {}
+
+    public resetCache(): void {
+        this.openSlidesService.reset();
+    }
 }