Comment 3 for bug 1827628

I believe the same issue would exist if using the same_host or different_host hints which are used by the SameHostFilter and DifferentHostFilter. Those aren't for server groups, they are for saying "I want my server on the same host as some other server(s)" or "I don't want my server on the same host as some other server(s)". I think it predates groups.