WebDynPro ABAP iView Flickering

Hello Everyone,
This one is weird. I have WebDynPro ABAP iViews created in the portal which rendered fine. But suddenly, the iViews started behaving weirdly - they started flickering, as though the iView is being refreshed again and again so the display never finishes rendering anything. If I put on my headphones, I can hear the tap sound which you hear when you hit "Refresh/F5" on IE. This means for some reason, the iView is automatically refreshed and I don't know why.
If I go to the WebDynPro App URL directly, everything seems to work fine. Also, I created a fresh new iView just to see if my old iViews are messed up, but the new one also flickers.
Did anyone see this? Any suggestions what could have gone wrong between the Portal and the WD app?
Any help is appreciated!
Thanks,
Kiran

Here's the URL
http://<portal>:<port>/irj/servlet/prt/portal/prtmode/preview/prtroot/pcd!3aportal_content!2fcom.<company>!2fContent!2f<project>!2fGS!2fiViews!2ftest?sap-config-mode=true
We wondered if the iView started falling apart after some strange logic was added to our WebDynPro ABAP code, so to test this we created a very simple app just displaying a 'hello' message. Even this app fails when an iVIew is created and previewed. The app works fine run directly on se80.
There should be some thing wrong with the portal itself.
Thanks,
Kiran

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