createVisualShapeArray fails or produces wrong colors

[jmainpri]

Hi there,

I am trying to display things with multiple primitive shapes created programmatically.
Using createVisualShapeArray seems the fastest and most appropriate way of doing that.

The problem is that either I get

case 2: 1 shape at a time works but slow
case 3: 15< shapes works but colors are wrong
case 1: 15> shapes: pybullet.error: createVisualShapeArray failed.

Here is a link to a stand-alone script to reproduce the 3 cases
https://github.com/humans-to-robots-motion/bewego/blob/87c9bc3a595b1d1372937befcbeab60bc953cc9d/examples/show_sphere_array.py

I use macOS Big Sur with a anaconda install

pip show pybullet
Name: pybullet
Version: 3.1.8
Location: /Users/jim/opt/anaconda3/envs/env-pyrieef-py3/lib/python3.6/site-packages

Is this a known bug?

Best wishes,
-- Jim