Found a pod that was altering UIImageView behavior through an extension.
Still not entirely clear why it doesn't affect anything in local Xcode builds though, only in uploaded production/Testflight builds.
austenesus
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