Hi tonight-excitement,

Thank you very much for the file.

Yes, that is not following typical MoGraph behavior.

The Plain Effector provides the Field Color to the Object Color. If you set the User Color's Attribute Name to "RSObjectColor" (It is in the Object Preset, as in the example below, you should get the wanted result.

Your file (please render)
CV4_2026_drs_26_MGmt_01.c4d

Screenshot 2026-01-13 at 9.55.10 PM.jpg

Please let me know if that is working for you.

My best wishes for your project.