Broken/missing thumbnails in pageview

Hi, I apologize for reposting an issue that I saw listed as closed... it appears to have been closed without a fix or a workaround. I deleted a large number of images that I had uploaded, inadvertently deleting maps from several pages.  The pages thumbnail shows some sort of placeholder icon for these images even after I reuploaded and replaced the missing maps.  It makes page selection awkward. I tried selecting and deleting everything on the map layer, but nothing selects and the thumbnail remains broken.  I tried copying the page from the pages screen, but the new page has the same broken icon. Is there actually no way to fix this?  roll20 is smart enough to place the placeholder icon, why not just regenerate the thumbnail?

Unfortunately, those broken images can sometimes hang around invisibly. The only way to get rid of them is either to delete the page, or sometimes a script can destroy them. You can also try a  Help Center Request . A dev may be able to clear broken image links with less hassle.

The pages in question have a fair amount of effort into the dynamic lighting layer.  If there was a way to copy the dynamic lighting to a new page, I'd be fine deleting the old page and redoing the map and gm layers.  Alternatively, if there was a way to wipe clean the map layer for the existing pages to clear the broken images, I'd be fine with that too.

It seems I can select all of the dynamic lighting lines and copy & paste them into a new page.  This should be enough to get around the bug.