Although I don’t understand the code I’ve been using the additional CSS I found on a forum to move the caption to below the images in Guttenberg Galleries on my pages. It’s worked fine for a couple of years. Now when I create a new page it seems to ignore the code and the caption remains on the image. The pages I created previously still have the caption below the image.
I also noticed that when I change the code in live mode it affects the old pages, but nothing happens on a new page.