Rotation of the Particle System is ignored for velocity over lifetime when the simulation space is Custom. Is this a bug?

When I create a particle system that uses velocity over lifetime, and use a custom simulation space, the rotation the particle system is ignored and only the rotation of the transform that I gave to custom simulation space is used.

Steps to reproduce:

1. create a particle system.

2. set the simulation space to world

3. make start speed 0

4. enable velocity over lifetime and make y=10

5. select local for space inside the velocity over lifetime

6. rotate the object around the z axis to see that the particles move with the object.

7. Create another game object and reset its transform

8. Change the simulation space of the particle system to custom and give the new game object created at step 7 as the relative transform

9. rotate the object with the particle system around the z axis to see that the particles do not move with the object.

10. rotate the gameobject created at step 7 around the z axis to see that particles move with the object