Haven’t solved it, but do get it quite a lot with HD comps if I turn on motion blur, so at least on my macbook pro its entirely due to using motion blur. This is a huge shame, as 99% of my projects need motion blur applied.
I have found a workaround that works most of the time. Go into your comp settings, navigate to the advanced tab, lower the samples per frams to around 12, and same with the adaptive sample limit. It doesn’t work all the time, but it has gotten me out of a couple tight spots.
If anyone can crack this case, we are all ‘eyes’!