Limit on number of attrs in replica conf?

Hi all, Is it possible I discovered a limit on the number of attributes I can specify on the "attrs" parameter of the replica directive in slapd.conf? In my config file, for the replica directive, I explicited a long list of attributes. On the provider side I can see, on the provider slapd logs, that only 8 of the attrs I specified on the replica directive are actually asked. Plus objectClass, structuralObjectClass and entryCSN. Is that the expected behaviour?

I already checked on the man page and I don't see this limitation explicited

Thanks in advance Marco