Art VandeIay
Attractive Membrane
I guess it’s the issue with MCU1 since it may not support RCCB
Several Model S/X from August 2017 to March 2018 had MCU1 and Autopilot 2.5, which uses RCCB color filter array cameras. So we know for sure that MCU1 can handle the autopilotCameraType 2 parameter.
Your issue must be something else.
Fortunately you were able to make everything work again by reverting the setting; specially since you don't need to change anything for all the systems to work just fine.