There are three points in the issue. I don't know if they are linked.

1. I have a repeater named myrepeater, if I try the completion, I get {!ametys join=myrepeater q=""}, I should have the choice between myrepeater and myrepeater_s_dv at least.
2. I try to get a submetadata of the repeater with the -> symbol and the autocompletion but I get the metadata of the original content type only, not the submetadata of my repeater.
3. Finally, I already get this problem : CMS-8585, I don't understand why this issue is closed.