I've inserted a gallery, using files from the media library. However, when I add new files to the library, or upload them straight into the gallery, they seem to overwrite the previous files. Actually, when you look at the html, the previous images are there, but just don't display. If you remove the uploaded files from the gallery, then the previous images display fine.
Any suggestions? I've narrowed the problem down to Hatch - the gallery displays fine with other themes.