~Repro steps~
1.) Turn your cloning off
2.) Switch into a public avatar
3.) Have another person select you and click "view avatar details"
4.) They should then click on the expand button in the top right corner that'll bring up the main menu details for the public avatar
5.) Then they should hit "Back" and then "Change into Avatar"
If the avatar is public, they'll swap into it, if it's private then they will not.
Ideally the "Change into Avatar" button underneath the avatar turntable should be greyed out according to their settings.