This is an example of a particle system with no velocity and 0.1 stretch value. On Mac, the particle system renders a white circle when you press play, on Windows (and iOS), the particle system does not render.
Confirmed - thanks for the simple repo case!
I’ve created https://github.com/playcanvas/engine/issues/1702
@codebon has submitted a fix and I have merged it. We’ll deploy this next week for you.