ID 426890 - The filter knob is missing from the Timewarp soft effect when viewing the Properties bin.

Problem summary
The filter knob is missing from the Timewarp soft effect when viewing the Properties bin.

Customer reported version
nuke.12.0v3

Customer reported platform
centos7

Steps to reproduce

1) In Nuke Studio/Hiero, import footage and bring it to the Timeline to create a sequence.

2) Right-click the clip and select Effects > Timewarp.

3) View the Properties bin for Filter.

Expected behavior
The Filter knob should be readily available on the Timewarp soft effect.

Actual behavior
The filter knob is missing from the Timewarp soft effect until after saving and reloading the project.

Workaround
Copy/pasting the soft effect allows the filter knob to appear.

Reproduced by Support in

NukeStudio/Hiero 12.1v1 - Windows 10, CentOS 7, macOS 10.13

Nuke Studio/Hiero 12.0v5 - Windows 10

Nuke Studio/Hiero 12.0v1 - Windwos 10

Nuke Studio/Hiero 11.3v5 - Windows 10

Nuke Studio/Hiero 11.3v1 - Windows 10

Nuke Studio/Hiero 11.2v1 - Windows 10

Nuke Studio/Hiero 11.1v1 - Windows 10

Nuke Studio/Hiero 11.0v1 - Windows 10

Nuke Studio/Hiero 10.5v1 - Windows 10

Nuke Studio/Hiero 10.0v1 - Windows 10

Nuke Studio/Hiero  9.0v1 - Windows 10, CentOS 7, macOS 10.13

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