Problems with the style of a page

I have tried many times on my app to save a page and even publish it. When I go to the style and try to change it to say grid all my content disappears. I have tried many ways and still the same.
How can I fix this. tried to ask in the fb group and no response.

If you select a layout for your page (grid, list, custom, etc.), develop that page, and then choose a different layout, you are correct. The page will reset, and you have to rebuild. This is why I always select custom when I go to build my Glide pages.