ID 496818 - Particles in Hydra Viewer are not displaying different particles emitted from the same emitter

Problem summary
Particles in Hydra Viewer are not displaying particles emitted from the same emitter

Customer reported version
nuke.13.1v2

Customer reported platform
10.15

Steps to reproduce

1) Open the attached colouredParticles.nk Nuke script, the particles are different colours

2) Open the Viewer properties > 3D> Set the renderer to Hydra, all the particles are now the same

Expected behaviour
For the particles Viewed with the Hydra renderer to be different

Actual behaviour
They are all identical, maying working with particles in the Hydra Viewport very difficult:

Workaround
Use the Nuke renderer

Reproduced by support
This bug has been reproduced in:
Nuke 13.1v3 - Windows 10, CentOS 7, macOS Big Sur

Nuke 13.0v1 - Windows 10, CentOS 7

Earliest version tested
Nuke 13.0v1 - This feature did not exist before this version
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