We have been working on the display of images when you are logged in. Some users have commented on issues with the display.
Having applied a number of small changes in the last week it is now only affecting users with Microsoft browsers (Edge and Internet Explorer).
Firefox, Chrome and non-Microsoft browsers are displaying images as we originally intended.
The problem is down to the way specific browsers use the canvas which is the container within which the images are displayed. Microsoft translates web standards meaning that when an image is smaller than the canvas it will abort the display - so will not display anything. For these browsers we are displaying the image at a zoom level larger than the canvas.
We are looking at other options so that the images can be displayed for all users. We may have to reduce the canvas size for all browsers and are looking at alternatives to OpenLayers which we use to zoom into the images.