We have discovered that if a group submits an assignment, but the group isn't full, other students can sign up in the group and see the submitted assignment on the group's homepage.
We have had a specific example where a student warned that he could have access to all the submissions so long as the groups weren't full before the deadline.
This would result in plagiarism because students could go in and see what the other groups have submitted before the deadline.
The only temporary workaround was to turn off the self sign up before the deadline.
Does this mean that you can't use self sign up for the creation of groups for group assignments?
Video example on a norwegian course no sound added