Builds from AppStudio use PhoneGap Build version cli-9.0.0. That is made up of version 5.0.1 of iOS and 8.0.0 of Windows from Cordova. Cordova iOS has since been updated to 5.1.1. What Adobe needs to do is get PGB to use the updated version - the problem should be solved.
The question is whether Adobe will do this. They are not saying.
If PhoneGap does not get updated, we’ll all have to use PhoneGap CLI, or hope someone comes up with PhoneGap replacement.
We are watching this closely and will do whatever we can to help.
You can follow what the PhoneGap community is saying here: (login required)