Hi, Notch Team.
Here is another problem: It looks like the Shape 3D (Sphere) node passes broken UV coords to Mesh Particle Emitter if the Randomize Order checkbox is unchecked.
Somehow, the pattern of particle distribution looks similar to that of the UV distortion I reported here: https://www.notch.one/support/forums/topic/bug-shape-3d-wrong-uvs-on-the-sphere-shape/.
The test file and screenshots are attached.
Thank you.
-Andy