<h:commandButton> Create a new CDI #ViewScoped on Click, instead of using existing one - jsf

Question

In a JSF 2.2 application, a user visit the link test.xhtml?id=324 , The page must have the paramater id. The page is backed by a CDI #ViewScoped Bean called TestBean.
The fields get initiliazed using a #postconstruct method
#PostConstruct
public void initialize() {…}
and this method that, load data based on id, if id is not present or correct, then direct the user to another page
<f:metadata>
<f:viewAction action="#{testBean.redirectNoParameters}"></f:viewAction>
</f:metadata>
public String redirectNoParameters() {
//method load data based on id, if id is not present or correct, then direct the user to another page
test = testDao.find(id);
In this page there is a comment section
<h:form role="form" prependId="false" >
<h:selectOneMenu value="#{testBean.sortComment}" valueChangeListener="#{testBean.orderComments}">
<f:ajax event="change" execute="#this" render="comment-listing" />
<f:selectItem itemLabel="Recent" itemValue="1"></f:selectItem>
<f:selectItem itemLabel="Oldest" itemValue="2"></f:selectItem>
<f:selectItem itemLabel="Popular" itemValue="3"></f:selectItem>
</h:selectOneMenu>
</h:form>
<div jsf:id="comment-listing">
<div >
<h:form role="form" prependId="false">
<ui:repeat var="comment" value="#{testBean.comments}" >
<div >
<div >
<div>
<h:commandButton value="#{comment.votes.size()}" action="#{testBean.upVote(comment)}" >
<f:ajax execute="#this" render="comment-listing" immediate="true"/>
</h:commandButton>
</div>
</div>
<div >
<h4 >
<h:link outcome="channel">
<f:param name="handle" value="#{comment.commentor.handle}"></f:param>
#{comment.commentor.handle}
</h:link>
on <span class="c-date">#{comment.creationDate}</span>
</h4>
#{comment.comment}
</div>
</div>
</ui:repeat>
</h:form>
</div>
</div>
As You can see for each comment there is a <h:commandButton> for a user to upvote the comment (like in youtube, stackoverflow…) . When the method is clicked it works as inteded. The method testBean.upVote(comment), is called and the ui is updated.
THEN I use the first form above to Re-order comments, say for example the change is from popular -> Recent. Also the method does its job and the ui is updated.
Till now all is working great.
However, When I click the upvote btn/method (of a different comment) AGAIN. The contsructor get called, so is #postconstruct, and the redirectNoParameters().
I have tried removing all ajax tag to see if it is an ajax problem. And The problem still occurs. So it’s not an ajax issue.
I have tried remove the parameter comment from the method "#{testBean.upVote(comment)}" to see if that’s what producing the problem. And The problem still occurs.
I have tried using <c:forEach instead of <ui:repeat . Still no hope.
What’s produce the problem? Why is this happening instead of just calling the method of the command button ?? Thanks.