Thank you for the answer William, but I am sorry to say, that it still doesn't explain the phenomenon. My objective is to have students submitting as a group while being able to see the submissions of other groups. There are 2 settings, I believe. If independent or not, I am not sure:
Students submit in groups {NO, Yes}
Help-Text: If enabled students will be divided into groups based on the default set of groups or a custom grouping. A group submission will be shared among group members and all members of the group will see each others changes to the submission.
I can confirm that this setting works. If one member of a group makes the submission it is considered a submission for all group members. Perfect!
Group mode: {NO GROUPS, separate groups, visible groups}
Help-Text: This setting has 3 options:
1) No groups
2) Separate groups - Each group member can only see their own group, others are invisible
3) Visible groups - Each group member works in their own group, but can also see other groups
The group mode defined at course level is the default mode for all activities within the course. Each activity that supports groups can also define its own group mode, though if the group mode is forced at course level, the group mode setting for each activity is ignored.
This help-text doesn't mention anything about "teachers ONLY" as you say, and in fact there is no change in the teachers view whether is is set to visible or separate.
Unfortunately, there is also no change in the students view. I tested an assignment with {Students submit in groups = Yes; Group mode = visible groups} and an assignment with {Students submit in groups = Yes; Group mode = separate groups} but i cannot see any difference in the students view. Even with visible groups students cannot see the work of other groups. My tests contradict the help-text "Visible groups - Each group member works in their own group, but can also see other groups".
I'm probably missing somethin here. Could somebody please explain or give me the settings needed to have students submitting as a group while being able to see the submissions of other groups? Thank you very much.