Group permissions inheritance wrong displayed/calculated

Summary

While beeing the owner of a group I will be added as owner of newly created repositories in this group, which is what I would expect. But if a repository is moved from, for example private space to this group I am the owner of, I will be listed in the moved repository as maintainer.

Steps to reproduce

• Create a group
• create some projects inside this group
• create a project in your own namespace
• move this project from own namespace to the group
• go to the details of the group and/or the members of the moved project

Example Project

I created https://gitlab.com/schwedenmut-testgroup to show this behaviour.
Testproject and testproject2 were created directly from the group details page whereas testproject3 was moved from my personal space.

What is the current bug behavior?

Either the moved project should obey the inherited and more important group roles and display this, because it seems that this could only be a display error because adding myself to the project with Owner role results in the following error:

What is the expected correct behavior?

Display the correct role.

Relevant logs and/or screenshots

group display	group member display	project member display

Output of checks

This bug happens on GitLab.com
This bug happens on my GitLab CE 1c1d47c5

Possible fixes

Have not yet looked into the related files, sry.