Picture formatting in quiz

I have been adding .png files to questions in microsoft forms as a quiz.  When I add the picture the formatting is fine, if I go back and edit the question in any way the format of the picture changes automatically and crops/zooms in on the image. 

Is there a way to stop this happening? At the moment I delete the image and reload it back in....? see pictures below, in the 3rd screen shot there is this option to zoom/crop but I cannot get it back to as it was originally it doesn't change when I use it. 

I am a mac user.