This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.
If you check "actor hidden in game" in the details panel and then set that value to false durring runtime, any particle system component attached to that actor will remain hidden.
The actor is now visible however the particle system component isn't
The actor and the particle system is visible
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-37651 in the post.