ID 508201 - Pack UVs seems to automatically select a UV map by default, but it doesn't actually select it.

Problem summary
Pack UVs seems to automatically select a UV map by default, but it doesn't actually select it.
 
Customer reported version
modo.15.2v3
 
Customer reported platform
windows10
 
Steps to reproduce
 
1) Launch Modo.

2) Load customer provide scene.

3) Enable Mesh Operations Viewport option.
 
4) Expand the Deformer Stack item and click on the Pack UVs operator.
 
5) Go to the Viewport split options > 3D Edit > UV 3D Split
 
6) In the UV 3D portion of the viewport click on the UV drop-down and select QP_Preset.
 
7) You should then see that the UV islands are not oriented in any unified direction.
 
8) In the Properties section for the Pack UVs operator the alignment is set to horizontal.
 
9) Click the dropdown in Properties for Name and select the QP_Preset option that was already visible.
 
10) At this point the UV islands in the UV viewport should now align correctly in the horizontal.
 
Expected behaviour
The UV islands should already be aligned in the selected orientation.
 
Actual behaviour
The already defaulted name must be re-selected for the alignment to take effect.
 
Workaround
Unknown. 
 
Reproduced by support
 
This bug has been reproduced in:
16.0v1 - Windows 10 / Mac OS X 10.14
15.2v1 - Windows 10 / Mac OS X 10.14
15.1v1 - Windows 10 / Mac OS X 10.14
 
Unable to reproduce bug in:
15.0v3 - Windows 10 / Mac OS X 10.14
 
Earliest version tested
15.0v3 - This feature did not exist before this version