CGImageSourceGetStatus returning kCGImageStatusIncomplete only on iOS 13.1

We fetch images from our server and store them internally as `CGImageSource` objects created by `CGCreateImageSourceForImageAtPath()`. Before rendering, we call `CGImageSourceGetStatus()` to verify it's a valid image.
On iOS 12 and 13, this always returned `kCGImageStatusComplete`. On iOS 13.1, it is always returning `kCGImageStatusIncomplete`.
Has anyone else run into this? Any thoughts on whether it is a bug or a change in how we are supposed to use `CGImageSource` objects?
Thanks,

Tom Aylesworth