NDS Groups are not being migrated completely, "Done with group" does not show in the log.
In this particular scenario, Migrator for NDS is migrating groups and reaches a specific group and stops. "Done with group" does not appear in the log and the group migration stops without any indication of error.
In this particular case, there was a (user) template object that appeared on both the Membership and Security Equal to Me tabs of the NDS groups in question. It appears that this may have been an old method of adding template objects to groups, as this only occurred for old templates. If a new template was created in this environment and was added to the group through the template object, then the template does not appear in the group. However, new user objects created using the template do show up as members of the group, as expected. In this case, the resolution was to re-create the user templates.