Blank page with APM Portal Access resource
Customer uses APM with a Portal Access resource. When accessing this resource we can see the page being loaded. Text and images are shown, but when all is completed, we get a blank web page.
To strip down the configuration I setup a simple LTM configuration in my lab. No APM, just node, pool and VS. A simple Rewrite profile to rewrite the hostname and I can access the web page and it remains visible.
Knowing this is working, I created a Full Webtop and put the same web site as Portal Access resource on this Webtop. At that moment I have the issue when viewing this web page. Looked at rewrites, patching etc but nothing seems to help.
Fiddler trace seems normal but show a 504 at some point, but not sure this is relevant because there is no indication of latency or lack of response from website or F5 appliance.
I am on version 184.108.40.206. Customer is on 220.127.116.11.
I know there is not a lot to go on, but if anyone could me give me some tips and tricks that would be great.
Other sites and applications via AMP and Portal Access are working fine. It is just this single site.