Auto-Fit tick box does not work and has no effect when placing images into a Frame or Rectangle
I am using InDesign CC 2018 V13.1. In previous versions the Auto-Fit tick box worked just fine. With CC 2018 it does not. When placing an image into a Frame or Rectangle, ticking the Auto-Fit tick box has no effect. The image is placed into the box at full size. I then have to resize the image manually or using the Fit Content To frame button. I teach InDesign at Cambridge University and this missing feature is confusing for beginners. Please let me now how to rectify this issue.