My released version appears to be using a old model version of Core Data, xxxDB 101j instead of xxxDB as defined in the VersionInfo.plist (package contents of xxx.xcarchive submitted to the app store). This has not been an issue on development devices or releases to TestFlight.
It is using the last listed version in VersionInfo.plist, not the version defined in the NSManagedObjectModel_CurrentVersionName property. Interestingly all the versions have a .mom file including xxxDB but xxxDB also has an .omo file as well.
Has anyone bumped into this issue and found a work around?