Synchronize Group Memberships feature for Opensourse LDAP

Hello,
I would like to understand
Synchronize Group Memberships feature for Opensourse LDAP with mapping that feature for PRO/ Enterprise or it's for Free as well.

Because I met on Open-source release the following situation,
after upgrade start to syncing the access.
But once another admin set mapping, all membership mapping stop to sync.

Looks like it's something wrong with that module

Cheers,
GT