Substance Painter PBR Validate filter, is it supposed to function only in legacy ?

Hello,

I'm currently working on a project  where we had to change the color management of Substance Painter several times, we started in legacy, then moved to ColorIO/ACES 1.2, and finally it's set to ColorIO/Substance.

In our texturing process we need to validate our textures for our client with the PBR validate filter, but with each changes I noticed discrepencies and uneven results.
A material that is perfectly fine in legacy, becomes totally red in ColorIO/ACES 1.2, and between ACES 1.2 and substance, there are some differences in the validation colors.

In my understanding I was thinking that if it's valid in one mode, it should be valid in the others too, only the representation of the colors on screen should change depending on the chosen Color Mode. Is that correct ?

Since the recents modes additions in color management mode, is the PBR validate filter is still suited or is it designed to function only in legacy ? 

Thanks for your help