Thank you for the detailed response. It turned out that everything only works fine if you are logged into the WordPress admin. If you check from incognito, there is an error in the console:
VM1774:2 Uncaught ReferenceError: cf7_datasource_register_recordset is not defined
at <anonymous>:2:1
at (index):3:5388
at new Promise (<anonymous>)
at RocketLazyLoadScripts._transformScript ((index):3:5080)
at async RocketLazyLoadScripts._loadScriptsFromList ((index):3:5481)
You can see it yourself at https://studibucht.de/test-page/. CF7 is at the bottom of the page, the “Arbeitstyp” field should display “Masterarbeit” by default when the page loads. This is what happens when you are logged in.
We are using WPRocket and I thought at first it was all about jQuery, I specifically turned off all restrictions for jQuery. But it still doesn’t work.
Could you suggest a solution to this problem?