[Samba] New group membership not taken into account on member servers

[Sébastien Le Ray]

Hi list,

I run into an issue on my members servers. They don't "see" new 
memberships of users.
wbinfo -r someuser does not returns the new group GID (either newly 
created group or already existing one).
wbinfo --group-info somegroup correctly returns "someuser" as its member

Tried net cache flush, restarted winbind.
It occurs on two (one 4.1.9, one 4.1.11) of the three samba member 
servers I have. The third one is a 4.1.11 too.

Any hints?

Regards