I tested this on a standard installation and I do get results. Have you created custom fields, or did you change settings from the basic installation of the module? Do you get any error messages when you enable debug mode in the core?

@eeevoc737207 I cannot replicate this on a clean install of ImpressCMS 1.3.6.1 Is this on the site with the problems in the encoding of the data?

yes, I have created a lot of new fields, the database is all in utf8_general_ci and use the mysql connection, not pdo at the moment, the module is original, not hacked at all,

I have no specific error message, only some notices

ok, I'll try it with extra fields then. PDO or MySQL shouldn't make a difference, but I'll verify that one too.