Pink flickering in final renders on Mac

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Hi There,

When I export a final Prores, one of the cuts shows pink flickering (see attached).

Identical footage/correction shows no issues. The pink appears when the footage is cross-faded or when text is placed over it (Apple Motion text footage with alpha) and only in the final render, not in the rendered timeline.

I found similar questions on the forums (pink and green) but they seemed to be related to a Windows Intel driver issue. Has anyone see this on a Mac or know how to fix?

Any pointers would be much appreciated.

Cheers

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Mac OS 10.15.6

Premiere 14.3.2, Build 42

Exporting Prores 422, Quicktime

2013 Mac Pro, Dual D700s, 64GB Ram

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Have just exported a Prores 422 HQ and it seems fine, so it's just the standard Prores 422 that displays the pink flickering.