The particle system generates some particles with NaN values. The
set_if_different mechanism skipped copying those due to a refactor
in the matrix equality test. Revert that part of 689633d802 for now.
A better solution would be to improve handling of NaNs in Cycles,
and to find and fix the cause of the NaN in the particle system.
Pull Request: https://projects.blender.org/blender/blender/pulls/139238
fc686ff257