Are you claiming this occurs from all Mac devices, including a Mac computer? Or just the iphone/ipad? Are you using the mobile app on the iphone/ipad, rather than browser access?
There is no method to re-orient once the image has been uploaded, therefore you need to try some work arounds or wait and see if if this issue might self-correct in the future, which it may or may not.
Try the Seinfeld method, upload an image oriented in the opposite position and see if it doesn't present in the upright position.