In Xcode 6 Beta 7 and all versions before it, I had a collection view that would update its constraints on its cells when an iPad would rotate between landscape and portrait. No
The workaround I have come up with is to use the 8.0 simulator for testing in the sim, and build the deployable using Xcode Beta 7. When I build using Beta 7, the app runs without this issue on devices using iOS 7. However, this does not help anyone that is deploying to the app store, so I apologize if this workaround does not work for your situation.