OCIO Prores MOV files spontaneously changed to ACES2065-1 interpretation inside a saved project?

This is a weird one.

We have a couple of projects that are in ACES, we're using Prores stock footage.

Around 20-28th August something happened and all our projects just changed the Prores Mov files color space in OCIO from sRGB Color Picker (that we assigned) back to default Aces2065-1.

It gets weirder.

We're talking about a project on 20th that I worked on, saved (I always save before rendering), then rendered out.

Now I open the project a week later and it's all wrong.

The rendered files from that project rendered fine on the 20th - now the same project - that has NOT been saved after those renders - is wrong. All Prores MOV files are changed to ACES2065-1.

ONLY Prores mov files changed - we have some Photo JPEG Mov files that kept their sRGB interpretations.

It is bizarre - correctly saved projects changed their content.

I thought that maybe the act of opening the project file does the mess, but if I open the same project file but from 18th August - all the Prores interpretations are still sRGB so nothing changed.

I'm not even asking for a solution - just a question, has anyone encountered this?