Hi! I am having the same issue still!
I have been trying to render a still image as PSD file, and while I am working in ACES color space, I am exporting to a standard sRGB format. And for some reason I cannot get it to be 1-on-1 how the LV looks....
The one thing I was able to deduce is that somehow the PV/renderer 'linearizes' the image and therefore the PV version looks different. So when I open my rendered PSD file and put a gamma transformation of 1/2.2 I end up with an image ALMOST close to the LV, but still not 100% exact...
Anyone with some new updates on this? I find this very frustrating that I am not able to just output a standard sRGB image from ACES