You can use the "Spawn Emitter Attached" function as a work around
1. Open up any project and make an Actor Blueprint, placing an instance of it in the world
2. Add a "Sphere" component
3. Add a "Cube" component that is attached to the sphere, and offset its location
4. place a "Spawn Emitter at Location" node onto begin play and spawn a particle system
5. Connect the return value to an Attach Component to Component function call, with the Cube as the parent.
Result: The particle system is on top of the root location of the actor (the sphere) instead of the specified cube
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-143042 in the post.