Message order in h:messages does not match component order

[Pavel Arnošt]

Hi,

with template:
<h:form>
    <h:messages />

    <h:inputText required="true" label="1" />
    <h:inputText required="true" label="2" />
    <h:inputText required="true" label="3" />
    <h:commandButton value="Submit" />
</h:form>

messages in h:messages does not match order of components, h:messages 
will show:

2: Validation error
3: Validation error
1: Validation error
It looks like that problem occurs where h:messages is wrapped in 
another component, this works:

<h:messages />
<h:form>
    <h:inputText required="true" label="1" />
    <h:inputText required="true" label="2" />
    <h:inputText required="true" label="3" />
    <h:commandButton value="Submit" />
</h:form>
but this doesn't:

<h:panelGroup>
    <h:messages />

    <h:form>
        <h:inputText required="true" label="1" />
        <h:inputText required="true" label="2" />
        <h:inputText required="true" label="3" />
        <h:commandButton value="Submit" />
    </h:form>
</h:panelGroup>
With Mojarra h:messages or PrimeFaces p:messages message order does 
match component order. Should I file this as bug?

Regards,
Pavel