Sometime within the last 6 months the mobile redirects (detect mobile phone and redirect to another portal) stopped working.

I have a rule, same as I always had.

But when I go to the home page in a mobile browser it doesn't redirect. 

The Rule is active.

My web.config has the correct handler placed below the UrlRewriter (system.web and system.webserver)

<add name="MobileRedirect" type="DotNetNuke.HttpModules.MobileRedirectModule, DotNetNuke.HttpModules" preCondition="managedHandler" />

What could this be?