I host a wordpress multi-site install for personal use. My Dad has a site on it, and he's come to me with a weird issue that I can't even figure out how to start debugging!
If you visit the site in Chrome: https://www.lyveden.org.uk/ .. and visit a page with images, eg "Garden Revealed", you can click on the images to see them full size. However, when you click "back", the browser reverts briefly to the page before showing the image again, and if you click back a second time you are returned o the previous page (the one prior to the one you opened the image from).
Dad has reproduced this on three PCs (two Ubuntu, one Windows). I couldn't initially reproduce it until I tried in a private tab, which might be a clue.
I tried using Chrome's developer tools to see what was going on but nothing stood out and I was quickly out of my depth!
I know it's not Linux related (highly doubt it's a server issue!) so it's OT, but does anyone have any clues?