Atm some effects in After Effects don't respect the motion blur samples.
For example the transform effect, so when you animate something moving fast with the transform effect you will see the banding.
The only way to fix this is to use cc force motion blur. But its very very very slow. And a bad solution.
I provided an easy to replicate project file and a video.
Using M1 Max & AE 22.6.0
Much love,
Dierenwinkel