Search not functioning correct after upgrade to 7.12

hey Guys,

I recently upgraded to 7.12

I now run into a few problems with the search function.

  1. In the search-settings I can choose between basic, basic + advanced and elastic. If I choose basic + advanced I get basic and lucene not advanced search. (In lucene an error that nothing is found, basic works)

  2. If I do use basic, I get results but with a few problems. The labels like module name or labels of dropdowns are not shown, only the database name. This problem is only with custom modules.

Switching between languages (we run in dutch), repair & rebuild & clearing the cache did not work. Any suggestions?