We're also experiencing the same issue. Apple Developer Support suggested following the App Thinning process (https://help.apple.com/xcode/mac/9.0/#/devbbdc5ce4f) however we already do this so wasn't anything new to try.
chris59david
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for