Trouble with Update Panel in Chrome browser

Hi. 

I work with update panel.

    <asp:UpdatePanel runat="server" ID="someid" >
        <ContentTemplate>
           
        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="someid2" EventName="somefunction" />
        </Triggers>
    </asp:UpdatePanel>

In IE all working fine. In Chrome and Firefox after ~30 seconds if i tried to clicked any button the postback is done and page will reset.

How to fix it?