ok, here is the link to simple test scene with morphing objects and change their colors using mograph and fields:
https://www.dropbox.com/s/fkjunodo1d3xl ... t.c4d?dl=0
I investigated that scene rendering wrong in all 2021.1.4 and newest 2021.1.5 builds.
But 2021.1.3 and experimental version 2022.1-XB0_R1 working good.
That's mean all present versions for R26 working with bugs.