Hello Andreas.
This usually happens when there’s a conflict with some other plugin, or the theme you’re using.
Can you please inspect your console and see if there are any errors in there?
Can you please change the theme and see if the issue is resolved? If not, then please deactivate all other plugins except for our plugin, refresh the page where the issue is, and see if it is resolved (it should be). If it is, then start activating other plugins one by one, and after each activation refresh the page to see if the issue reoccurred. Once it does reoccur, you will have found the plugin causing the issue.
Kind regards
