I faced the same issue.
1. Happens only in IE, when you navigate from one application (say A with web server as HTTP OHS) to another application (say B with web server as HTTPS apache). Both being webcenter applictaion
2. If i hit the URL of application B web server directly this does not happen
3. If I hit the weblogic managed server instead of the ws for application A and navigate to application B there is no _afrloop
4. When i access application A and navigate to application B through the WS _afrloop goes infinite
As solution I added the below parameters in my OHS http.conf file, and issue got resolved.
Yet there is one more issue where the IDM cookies are getting cleared, this will help if you are not using IDM in the OHS web servers for authentication.
Please provide inputs.
Header unset Cookie
Header unset Set-Cookie