Pretty sure apple phones always apply some kind of forced rotation on photos. The forced rotation even sticks when I carry the photo to my non-apple PC computer to edit it. Changing the rotation from a photo viewer does not actually change the rotation saved to the file.
Possible Solution: Edit the photo rotation from your photo app before you send the file anywhere else, and I would think that could fix everything. Otherwise save it as a new file copy and edit the rotation.
I really like your art style and color choices. What kind of tool and color media are you using?
Besides for my phone being an Android device I guess the root of the problem is the same. Will try this next time. Thank you very much :)