fix

src/app/shared/chat/group-messages/group-contacts/group-contacts.page.html

@@ -49,7 +49,7 @@
       </ion-list>
     </div>
 
-    <ion-virtual-scroll [items]="ChatSystemService.users | filter:textSearch: 'name'" approxItemHeight="70px" [headerFn]="separateLetter">
+    <ion-virtual-scroll [items]="users " approxItemHeight="70px" [headerFn]="separateLetter">
 
       <div class="item-divider" *virtualHeader="let header">
         <ion-label>{{header}}</ion-label>

src/app/shared/chat/group-messages/group-contacts/group-contacts.page.ts

@@ -237,6 +237,18 @@ export class GroupContactsPage implements OnInit {
 
   onChange(event){
     this.textSearch = event.detail.value;
+
+    this.users = this.contacts.filter( e => e.name.toLowerCase().includes(this.textSearch.toLowerCase())).sort((a,b) => {
+      if(a.name < b.name){
+        return -1;
+      }
+      if(a.name > b.name){
+        return 1;
+      }
+      return 0;
+    });
+
+  
   }
 
   clicked(){