ACES Tone Mapping affecting Layer Shadow AOV - Transparent BG & Separate Shadow

[lcetina]

Hi, I need to render an object using ACES tone mapping on a transparent background and with a separate Shadow layer.
With ACES tone mapping enabled in the Imager, the background on my Layer Shadows AOV is not pure white. If I disable ACES, the shadow pass is perfect (pure white background), but then my main object isn't tonemapped.
I have prepared simple scene to demonstrate the problem. How can I get the Layer Shadows AOV to have a pure white background while still using ACES for the main render, and crucially, without having to render the scene twice?
Thanks for any help