ID 404115 - ModelBuilder crashes when unwrapping and changing knobs in the uv unwrap window

Problem summary
ModelBuilder crashes when unwrapping

This happens when changing the unwrap options in the uv unwrap window, like iterations, threshold and separation, then applying the change

Customer reported version
nuke.n/a

Customer reported platform

Steps to reproduce

1) Open NukeX

2) Create a ModelBuilder node and view it

3) In the Shape Defaults tab, create a Cube, clicking in the Viewport to create it

4) In the Viewport left menu, select UV mode

5) Right click the cube> edge selection

6) Right click the cube> unwarp

7) In the iterations knob at the top, retype 100, replacing the original text, and press Enter, Nuke Crashes

Expected behaviour
For Nuke to unwrap the cube

Actual behaviour
Nuke crashed

Reproduced by support

This bug has been reproduced in:
Nuke 11.3v5 - Windows 10 - CentOS 6.9 - MacOSX 10.13

Nuke 11.3v1 - Windows 10

Nuke 11.2v1 - Windows 10

Nuke 11.1v1 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.5v1 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke 9.0v1 - Windows 10 - CentOS 6.9 - MacOSX 10.13 - regression

Unable to reproduce bug in:

Nuke 8.0v7 - Windows 10 - CentOS 6.9 - MacOSX 10.13

Earliest version tested
Nuke 8.0v7 - This issue no longer appears in this version and has regressed