ID 503127 - Expression links do not update on the Roto node

Problem summary
Expression links do not update on the Roto node.

Customer reported version
nuke.13.0v7

Customer reported platform
centos7

Steps to reproduce
1) In Nuke, create a Tracker node.
2) Create a Roto node and expression link it.
3) Save and close the script, then reopen it.
4) View the Roto node and scrub playback for any Viewer changes.

Expected behavior
The Roto node bezier should update from the expression linked Tracker node.

Actual behavior
The Roto node berzier does not update unless the Properties bin is open or the Tracker node is viewed.

Workaround
View the Tracker node prior to viewing the Roto node.

Reproduced by Support in:
Nuke 13.1v2 - Windows 10, macOS 10.15
Nuke 13.1v1 - Windows 10
Nuke 12.1v1 - Windows 10, macOS 10.15
Nuke 12.0v1 - Windows 10
Nuke 11.0v1 - Windows 10
Nuke 10.0v1 - Windows 10
Nuke 9.0v1 - Windows 10

Earliest version tested
Nuke 9.0v1 - This issue appears to be in all versions of the product