Groups cannot be differentiated when sharing

If there are 2 groups with the same name, they cannot be differentiated by the user when sharing. See the screenshot

Server: ownCloud10.6
App: CustomGroups 0.6.1

Steps to reproduce:

1. install CustomGroups 0.6.1 on ownCloud10.6
2. make a Group named 'admin' in CustomGroup
3. try to share a folder or a file and type admin in share search bar