Memory Game

1. Detailed steps to reproduce the bug (exactly how and when did it happen)
2. Platform and version number. E.g. Drupal, Wordpress, Moodle. -- Wordpress V 5.4.2
3. Mobile or Desktop. -- Both
4. Browser: Chrome, Firefox, Safari etc. -- Chrome, Firefox
5. H5P plugin version -- H5P V 1.15.0
6. H5P content type and version (if a content type was used), and a sample URL or attached H5P.
7. Any browser console errors. -- None
8. Any PHP errors.

Hi, I´m a teacher from a brazilian basic school, and I´ve created a memory game with the photo and names from my 20 students. I´ve selected the random option, with 6 pairs of cards.  Instead of randomizing between the 20 pairs, it randons only with the same 6 pairs always (that the program selected). It has frustated the student that didn´t "pop up". Is it an error? How can I solve it? (sorry for my bad English). It happens when playing in my account in h5p.test.schulcloud-thueringen.de, and also when students play in the Wordpress, with Chrome, Firefox, both in notebooks or cell phones.

RESOVED- My web hostting company had to make some changes.