resource mime type different in note en-media tag and when fetched from api

[AndroidGecko]

Within note fetched via sdk I have

<en-media hash="4b285dd131c77c96544cb0d93cb425d8" height="39" type="image/png" width="200" />

notice "image/png" type When I fetch the resources for the note

ENSession.shared.primaryNoteStore()?.fetchNote(withGuid: guid, includingContent: true, resourceOptions: ENResourceFetchOption.includeData, completion: { note, error in
                if error != nil {
                    print(error)
                } else {
                    for res in note.resources {
                        let fileExtension = res.mime.split(separator: "/")[1]
                        print("\(fileExtenstion)")
                    }
                }
            })
   

I get "image/jpeg"

This happens for many resources. For some, it works. Any idea why this might be happening?