On CiviCRM 5.6.0
I have a Smart Group based upon custom_param1=1 (as an example).
I change some values of custom_param1, to update my Smart Group in order to send a mail to its updated members.
But the Smart Group is not updated immediately (I have to wait 5 minutes before it is)
How can I force its update to have it immediately ?
(rebuilding the smart group cache has no effect)