Not sure if my organization will allow a portal deploy
But I will give it a try and see if there are improvements. And like you said, I will have to wait for certain strange timings to get it. Revert back to you then.
Thanks once again
You are welcome. You won't need to deploy a Portal, you can continue to use the webmap you have created in ArcGIS Online with the downloadable. You just have to deploy it on a web server...