Zoom Function Pixelates Image

Hello, I have a series of photos that we're using that we would like to use the "Zoom" function on. 

When I do not have the Zoom function enabled everything looks as it should. However when I add Zoom to a photo it becomes pixelated. When you click on the zoom button and it gets larger it looks as it should. 

I published to see if it was a preview problem and it appeared the same way. I have photo quality output set to 100%. 

I understand that if it was a poor quality image/had a low dpi this could occur when you zoom in, but why is it the image quality getting *better* when we zoom in? 

Thank you! 

3 Replies