ID 387320 - Mari creates a material thumbnails with incorrect colorspace representation

Problem summary
If the colorspace is set to something different than nuke-default, Mari creates a material thumbnails with incorrect color representation. 

Turning the view transform off makes the applied material to look like the thumbnail generated

Customer reported version

4.5v1

Customer reported platform

Steps to reproduce

1) Open Mari 4.5v1 and create a project with ACES OCIO config

2) Ingest a material using the ingest tool 

3) Apply the material to the object

result: The material applied on the object is lighter than the thumbnail. It looks like the material thumbnail is rendering in linear instead of sRGB. Turn the view transform off in the scene and the material applied looks like the thumbnail. 

Expected behaviour
The material thumbnail should use the same colorspace as the one set in the scene 

Actual behaviour
The material thumbnail is using linear instead of sRGB

Workaround
The nuke-default colorspace works as expected

Reproduced by support
This bug has been reproduced in:

Mari 4.5v1 - Windows 10 - CentOS 7

Earliest version tested
4.5v1 - This feature did not exist before this version