Photo Album page not displaying captions correctly

I’m trying out the built in Photo Album page for a new website. I’m running RapidWeaver Classic 9.2.1 on a M2 Mac Studio. I want to display photos as a gallery of thumbnails and for the captions to appear only with full size images. This is a built in option but I am finding it does not work correctly. The options are for captions to appear Nowhere, Anywhere, Thumbnails only, Full-size Images only. I find that only the first option works. Selecting any other option results in captions appearing with both thumbnails and full size images. Can anyone think of a way of fixing this?