Using widget to upload images and text into sidebar.
Formerly when I clicked on the image it would appear on my (Firefox) browser against a dark grey background at full uploaded size. Clicking on an image now opens a gallery of random images from my uploaded media file. Some of these are not relevant to the specific page.
How can I revert to the lightbox image?
Clicking on an image uploaded to the page (rather than the sidebar) still gives the lighbox version.