Apache Rewrite Proxys with Websockets taking forever to load

I currently have an Apache 2.4 server set up with mod_proxy, mod_proxy_ws_tunnel and mod_rewrite. I currently have the setup

RewriteCond %{REQUEST_URI} /policy-dev
RewriteRule ^(policy-dev/)(.*)$ https://mtanjvsgcvm01.nvp.cip.att.com:8443/policy/$2 [P]

The page uses websockets and when I go to the address, it takes over a minute for the page to load.

I’m getting the following error in my access log. - - [30/Apr/2015:17:32:52 -0400]
“GET /policy-dev/PUSH/?v-uiId=7&v-csrfToken=83dde385-15af-418e-bf79-e2045cbaf691&X-Atmosphere-tracking-id=959c7026-399d-4dde-970f-c98a74ae218c&X-Atmosphere-Framework=2.1.5.vaadin4-jquery&X-Atmosphere-Transport=long-polling&X-Atmosphere-TrackMessageSize=true&X-Cache-Date=0&Content-Type=application%2Fjson%3B%20charset%3DUTF-8&X-atmo-protocol=true&_=1430429605010 HTTP/1.1” 200 2050

Does anyone have any ideas how to solve this?

Sounds like the request gets stuck somewhere or the browser can’t interpret the response and after a 60s timeout, the client falls back to long polling. What does the browser network inspector say? Or the proxy log, or the server log