Cannot make sections invisible anymore

We just installed the latest versions of Nimble Page Builder and Nimble Pro in a new WordPress setup. Exported existing Nimble pages and templates from our old site and imported the content to the new site. Everything looks good but the “Device visibility” functionality doesn’t work anymore – sections that are supposed to be invisible on desktop, tablet or mobile devices are still displayed. Clearing the cache and deactivating the cache plugin doesn’t help.