iAds banner in portrait mode, but click leads to landscape mode

I have a universal portrait-only iOS app with iAds that I’m testing on various devices.  

On all devices, the test iAd banner comes in as portrait.

When I click on the test banner, the child full screen ad is portrait on an iPhone 5 and older iPod touch.

But on and older iPad, iPad Air and iPad Mini the child ad comes in as landscape.

Has anyone seen this issue?  Is there a work around?  Is this just a problem with Apple’s test ads?

As a follow-up, here is a discussion on Apples Forums.  

As a follow-up, here is a discussion on Apples Forums.