jsf - p:selectOneListbox ajax item selection changes scroll position -

there <p:selectonelistbox> 20 items. first 5 items can viewed in list , remaining can scrolled , selected. list ajaxified. when item numbers greater 5 selected (after scrolling it) scrollbar not remain @ place; moves top position. makes selected item (for example item 9) invisible. program uses ajax listener. app uses primefaces 5.0.

but, when ajax listener removed selected (item 9) visible , scroller not move top (remove p:ajax tag's listener attribute in below jsf page).

i know how make scrollbar not move when item selected while using ajax listener.

the jsf page:

<p:selectonelistbox id="list"                     scrollheight="100"                     value="#{bean.todo}">      <f:selectitems value="#{bean.data}"                    var="t"                    itemlabel="#{t.name}"                    itemvalue="#{t.name}"/>      <p:ajax process="@this"             update="@this msg"             listener="#{bean.valuechanged}" /> </p:selectonelistbox>  <br /><h:outputtext id="msg" value="#{bean.message}" /> 

the bean's code:

import javax.faces.bean.*; import java.io.serializable; import java.util.*; import javax.faces.event.ajaxbehaviorevent; import javax.faces.component.uioutput;  @managedbean(name="bean") @sessionscoped public class todosbean implements serializable {      private list<todo> data;     private string todo; // selected item value     private string msg;      public todosbean() {         loaddata();         if (data.size() == 0) {             return;         }          todo t = data.get(0);         string name = t.getname();         settodo(name); // select first item in list         setmessage(name);     }      private void loaddata() {         data = new arraylist<>();         data.add(new todo("1first", "1"));         data.add(new todo("2second", "2"));         data.add(new todo("3third", "3"));         data.add(new todo("4fourth", "4"));         data.add(new todo("5fifth", "5"));         data.add(new todo("6sixth", "6"));         data.add(new todo("7seventh", "7"));         data.add(new todo("8eighth", "8"));     }      public list<todo> getdata() {         return data;     }      public void setmessage(string msg) {         this.msg = msg;     }      public string getmessage() {         return msg;     }      public string gettodo() {         return todo;     }      public void settodo(string t) {         todo = t;     }      public void valuechanged(ajaxbehaviorevent e) {         string name = (string) ((uioutput) e.getsource()).getvalue();         setmessage(name + " selected.");     } } 

public class todo {      private string name;     private string desc;      public todo() {}      public todo(string name, string desc) {         this.name = name;         this.desc = desc;     }      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      public string getdesc() {         return desc;     }      public void setdesc(string desc) {         this.desc = desc;     }      @override     public string tostring() {         return this.name;     } } 

remove update="@this solve it. updating control move default state. might in newer version of pf default state improved , still @ correct position