In T66529#817500, @Grant Hobbs (gwhobbs) wrote:

I wound up rendering shots with fast rotating objects using the free version of Octane

I don't understand how this is still a Medium Priority task, it's a performance regression and it affects the only way blender can provide motion blur

May be related to T66529

Waiting for a fix, I found a temporary solution that helps hiding this artifact (it worked for me at least). Try increasing the Motion Blur Steps for each spinning object,using 6-7 did the job for me.