Mysterious Flash/Xml loading

Ok i have a swf that eases through xml loaded swfs from a external source…

Offline the flash/xml load in all the external swfs fine and all is viewable…

But Online something strange happens … Using Charles Proxy to minitor the events when viewing in the browser window i can see that all external swfs load as required but for some reason a select few dont show up…THAT IS UNTIL you refresh the page and they all appear without a hitch???

anyone had a problem like this before???