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ISSUE SUMMARY:
I often experience random loss of group credentials in Joomla ACL. Because of this, my users always lose their Joomla access based on user group, and I always got locked out because my superuser status is lost sporadically. I understand this is not a new problem, and mostly experienced by Jomsocial users. Have the issue been resolved by Jomsocial/Joomla in their latest version yet?
This is not JomSocial but Joomla! bug. We reported it here: github.com/joomla/joomla-cms/pull/5144
So I'm sorry but it's not up to us fixing it as it resides in Joomla! core.