Hey Joe,
I’m experiencing the same problem with banding,
workin’ in a linear workspace in AE.
I found a workaround. RAM preview as normal, then once you’ve got your frames stored in RAM, watch your sequence with space bar (or the play/pause button in the “Preview” menu) instead of 0 (RAM preview in the “Preview” menu).
Haven’t tested this on any machine other than my own. Hopefully it works for you.
Best,
Michael Relth