Missing checkboxes on new installation

When I install a new instance of ProjeQtOr and try to create a new user / contact / ... in Environmental Parameters > Users, some fields are shown as text fields:

• locked :
• is a contact :
• is a resource :
• closed :

After upgrading to a newer version of ProjeQtOr, they are correctly shown as checkboxes.



I have tried reproduced this by doing fresh installations of 7.3.1, 7.3.0 and 7.2.7. Then I tried installing 7.2.7 (fields shown as text entries instead of checkboxes), and then upgrading to 7.3.1 (and now fields are shown as checkboxes, which is what they should have looked like from the beginning).

Screenshot attached.