I think the problem is still there existing, that was reported to be fixed.
I did the following to get this error:
I have uploaded as pupil a landscape picture (extra bad, that the smartphone realizes it). As teacher I rotated it and annotated it as PDF and then saved and gave it back to the pupil.
As pupil you have two possibilites to view the annotations. (see pictures)
If I download the PDF the correction was false! The rotated picture is not shown fully and in the middle, as I corrected it as teacher.
As interactive PDF (second possibility) the annotations are at the right place.
Regards, Birgit (from germany, not greece!)