No matter what I do, I am unable to repeat the problem.
I have tested with a selection of nightly builds from the last 4 months, and I have not yet had the same frustrating stribes as seen in the test footage I linked in one of the above threads. I could go through some of the early builds that I used when I had the issue, but as that would mainly be an academic exercise, I don't see much point in that.
With this issue hopefully solved (fingers crossed) I am ready to use ML RAW video as soon as I get a project where the budget allows for the workflow

@arrinkiiii : If you still have issues with banding, could you post an example and upload a a DNG?