Video with VAST Preroll does not on iPad mini
we have an issue with the current JW player Ads Edition in combination with VAST prerolls on an iPad mini (only tested on iOS 6).
When a user opens our website and starts a video playback where a Preroll Ad should be shown before, he only sees the Loading Ad Idle Icon and nothing more. It works perfectly on a Desktop device and we can asure that the adserver also delivers video ads in this moment. On the Mobile device (even in Desktop mode), neither the preroll clip nor the actual mp4 video does start. It is also impossible to skip the PrerollAd. This is not ideal b/c the advertising feature banishes all our website visitors in this case because they cannot watch the actual video clip.
See a screenshot here ... http://www.regio-tv-stream.de/preroll.PNG
What can we do to prevent this behavior? Might it be an issue on player side or on adserver side?
Thanks in advance