At the global definition of my questionnaire, I defined "group by group" format.
When I execute the questionnaire, the questions appear organized in groups but the title defined for the question group does not appear.
It would be important that the participants had access to this clearer division by issue groups.
I started to have this problem when my institution administrator uploaded the version 3.18.0 + 190923. Previously, with an older version, I didn't have this problem.