fix

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

@@ -47,7 +47,7 @@
       </ion-list>
     </div>
 
-    <ion-virtual-scroll [items]="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/pages/chat/group-messages/group-contacts/group-contacts.page.ts

@@ -66,7 +66,7 @@ export class GroupContactsPage implements OnInit {
       headers: this.headers,
     };
     this.chatService.getAllUsers().subscribe((res:any)=>{
-      if(this.members){
+      if(this.members) {
         this.contacts =  res.users.filter(f => !this.members.some(item => item._id === f._id));
       }
       else{
@@ -149,6 +149,18 @@ 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(){