We are running on Hyperion 188.8.131.52 and now we encounter new issue in Production server. When we create or modify any Group / User (native directory) we are not able to see the effect / newly created group unless restart Foundation services. Is this behavior is bug or any mistake we did.
In UAT it is working fine and we migrated security from UAT to Prod.
Please try applying this patch and see if this resolves your issue,
Patch 13020096: EXTERNAL USERS NOT GETTING SAVED IN NATIVE DIRECTORY GROUPS