ID 497234 - Tracking still appears within the mask when using the CameraTracker node

Problem summary
Tracking still appears within the mask when using the CameraTracker node.

Customer reported version
nuke.13.1v1

Customer reported platform
ubuntu

Steps to reproduce
1) In Nuke, read in moving footage.
2) Add a CameraTracker node.
3) Add a Roto node and mask off a specific area of motion.
4) In the CameraTracker node, set the mask to Mask Alpha.
5) Track the footage, then view around the mask.

Expected behavior
The mask should eliminate any camera tracking.

Actual behavior
Some tracking still occurs within the bounds of the mask.

Workaround
There is no available workaround at this time.

Reproduced by Support in:
Nuke 13.1v1 - Windows 10, macOS 10.15
Nuke 13.0v1 - Windows 10
Nuke 12.0v1 - Windows 10
Nuke 11.0v1 - Windows 10
Nuke 10.0v1 - Windows 10
Nuke 9.0v1 - Windows 10, macOS 10.15

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