ID 392748 - Transferring a project which has Color Management Disabled to another version of Mari is causing incorrect color values.

Problem summary
Transferring a project which has Color Management Disabled to another version of Mari is causing incorrect color values.

The project must have a layer with a mask stack. 

Customer reported version

4.2v1

Customer reported platform
windows8

Steps to reproduce

1) Open Mari and create a new project with Color Management Disabled and an 8 bit channel in 4.2v1

2) Turn off View Transform 

3) Go to the layer stack and add 2 procedural color layers with different colors: the first layer - should be red (1,0,0) and the second layer white (1,1,1)

4) On the white procedural color layer add a mask stack with a procedural cloud layer

5) Adjust the cloud color values to: Color A: (0.909, 0.909, 0.909) and Color B: (0.224, 0.224, 0.224)

6) Save the project and open it in Mari 4.5v1

result: Color values are different 

Expected behaviour
The colors to be the same 

Actual behaviour
Colors are duller than the original project ​

Workaround
Using 16 bit channels is overcoming the issue 

Reproduced by support
 

This bug has been reproduced in:
4.5v1 - Windows 10 

4.2v1 - Windows 10 

4.0v1 - Windows 10 

3.4v1 - Windows 10 - CentOS 7 -OSX 10.12.6

3.3v1 - Windows 10 - regression

Unable to reproduce bug in:
3.2v1 - Windows 10 

Earliest version tested
3.2v1 - This issue no longer appears in this version and has regressed