ID 588144 - The curve in the Curve Editor tab does not correctly update when an expression controlled by a parameter is modified.

Problem summary
The curve in the Curve Editor tab does not correctly update when an expression controlled by a parameter is modified.
 
Customer reported version
Katana 6.5v4
 
Customer reported platform
CentOS7
 
Steps to reproduce
 
1) In Katana, paste the below xml code into the Node Graph:
 

<katana release="6.5v4" version="6.0.1.000004"><node name="__SAVE_exportedNodes" type="Group"><node baseType="Group" edited="true" name="Group" ns_bubbleZoom="0.0" ns_errorGlow="0.0" ns_fromContext="legacy" selected="true" type="Group" x="-136.5" y="-77.5"><group_parameter name="Group"><group_parameter hints="{}" name="user"><number_parameter hints="{&apos;label&apos;: &apos;number&apos;}" name="newParameter" value="10.1"/><number_parameter expression="user.newParameter*2" isexpression="true" name="result_of_expression"/><number_parameter expression="12*2+2" isexpression="true" name="no_expression"><fcurve name="Group.user.no_expression" version="4"><visible/><segments><segment expression="linear()"/><key><position x="1001" y="20"/></key><segment expression="linear()"/></segments></fcurve></number_parameter></group_parameter></group_parameter></node></node></katana>

 
2) Open the Curve Editor tab and set the edit flag (e) on the pasted Group node.
3) Under the Parameters tab, select the show curve icon.
4) Modify the user.newParameter parameter, observe how the results of the curves do not update. 
Expected behaviour
The displayed curve updates as the parameter changes.
 
Actual behaviour
The displayed curve does not update and sporadically changes when panning the view of the tab.
 
Workaround
You can hide and show the curve again to display correctly. 
 
Reproduced by support
This bug has been reproduced in:
Katana 7.0v3 - Windows 11
Katana 6.5v4 - Windows 11 / CentOS7
Katana 6.0v4 - Windows 11 / CentOS7
Katana 5.0v7 - Windows 11 / CentOS7
Katana 5.0v1 - Windows 11 / CentOS7
Katana 4.5v7 - Windows 11 / CentOS7
Katana 4.5v1 - Windows 11 / CentOS7
Katana 4.0v1 - Windows 11 / CentOS7
 
Earliest version tested
This issue appears to be in all tested versions of the product