ID 195681 - GafferThree: Master Materials can not be assigned to adopted packages

Applying a Master Material to an adopted light package is currently not supported in GafferThree. 
 

Customer reported version
katana.2.5v7
 

Customer reported platform
centos7

Steps to reproduce

1) Create two GafferThree nodes and connect them.2) In the upstream GafferThree, create a light.3) In the downstream GafferThree, adopt the light, and create a Master Material

Result: Note that the Master Material can not be assigned to the adopted light. Additionally, adopting a Master Material and attempting to assign it to an adopted light will also not work.

Workaround
Unknown.

Reproduced by support
 

This bug has been reproduced in:
Katana2.6v4 - Windows 7 - CentOS6.9
Katana2.6v1 - Windows 7 - CentOS6.9
Katana2.5v7 - Windows 7 - CentOS6.9
Katana2.5v1 - Windows 7 - CentOS6.9
Katana2.1v6 - CentOS6.9
Katana2.1v1 - CentOS6.9
Katana2.0v1 - CentOS6.9

Earliest version tested
- This issue appears to be in all versions of the product.

Expected behaviour
Master material should be added to the adopted light.

Actual behaviour
Master material cannot be added to the adopted light.