ID 354680 - Particle Rotation gradient setting for curve particle generators has stopped working.

Problem summary
The Particle Rotation gradient setting in the Curve Particle Generator properties doesn't affect the replicators propagated along the selected Curve item.

Customer reported version
modo.12.1v1

Customer reported platform
windows10

Steps to reproduce

1) Open the attached scene file in Modo 12.1v1. This scene contains a basic Primitive, a Curve, a Replicator and a Curve Particle Generator. The Primitive is used as the Prototype for the Replicator, and the Curve Particle Generator is used as the Point Source.

2) Switch to the Render layout. Enable the Preview Renderer.

3) Select the Curve Particle Generator in the Item List, then switch to the CPG Control tab in its properties. 

4) In the Control Gradients section, slide either control points for the Particle Rotation gradient - you will see no change to the rotation of the Replicator across the curve in the Preview Renderer.

Workaround
n/a

Reproduced by support
This bug has been reproduced in:
Windows 10
12.1v1

macOS 10.13
12.1v1

Earliest version tested
12.0v1 - This issue no longer appears in this version and has regressed