[Interest] Can't upload app to iOS App Store when building with Qt 5.9.x

[Rogerio Nicolau]

Hi

I am trying to release a new version of my app to the iOS app store. I'm 
using Qt 5.9.x and it builds fine and can be sideloaded but it causes 
xcode to freeze when trying to validate or export to the app store.

I don't have this problem with Qt 5.10 but this does not support iOS 9 
which I still need to do (to support old iPads). Even trying to validate 
the build of the version that is currently live in the app store fails.

Is this a known issue? Does Qt 5.9 no longer support the iOS app store?

Thanks
Rogério