I spoke to one of the engineers linked to the project and there’s no functionality on their profile to leave the Group either. Is this a bug or is there a specific user that can control every company, project, group and users?
I have the same issue, or very similar at least. The users I want to remove from my group do not show up on one group display page (Explore groups · GitLab/-/group_members), but do on another (Explore groups · GitLab/-/usage_quotas#seats-quota-tab).
In addition, the invited group to which they belong … is the group I’m try to remove them from! and that I am the Owner of!