ID 544742 - In Katana you are unable to move individual parameter keyframes in the Dope Sheet tab, if "Show Curve" is active on the parameter before the tab is created

Problem summary
In Katana you are unable to move individual parameter keyframes in the Dope Sheet tab, if "Show Curve" is active on the parameter before the tab is created. However, you are still able to move the entirety of a specific frames Keyframes as a whole.
 
Customer reported version
Katana 5.0v4
 
Customer reported platform
CentOS 7
 
Steps to reproduce
 
1) Open Katana and ensure you do not have a Dope Sheet tab in your layout.
 
2) Create a PrimitiveCreate node.
 
3) Set some keyframes on the transform.translate.x parameter.
 
4) Click the "Show Curve" icon.
 
5) Add a Dope Sheet tab.
 
6) Try to move an individual parameters keyframe.
 
Expected behaviour
Individual parameter Keyframes are editable for parameters that were already set to "Show Curve".
 
Actual behaviour
Individual parameter Keyframes are not editable for parameters that were already set to "Show Curve". 
 
Workaround
Ensure you have a Dope Sheet tab generated before enabling "Show Curve" on any parameter.
 
Reproduced by support
This bug has been reproduced in:
Katana 6.0v2 - Windows 10, CentOS 7
Katana 5.0v5 - Windows 10, CentOS 7
Katana 5.0v4 - Windows 10, CentOS 7
Katana 5.0v1 - Windows 10, CentOS 7
 
Unable to reproduce bug in:
Katana 4.5v5 - Windows 10, CentOS 7
 
Earliest version tested
Katana 4.5v5 - This issue doesn't appear in this version and has regressed.