ID 406794 - Adjusting the settings on a Bend Effector connected to a MeshOp Primitive results in a crash.

Problem summary
Adjusting the settings on a Bend Effector connected to a MeshOp Primitive results in a crash.

This occurs on the height, length and depth user channels.

Customer reported version
Modo 13.1v1

Customer reported platform
Windows 10

Steps to reproduce

1) Download and open the attached scene.

2) Go to the Setup layout and in the 3D viewport select the locator.

3) Left-click and scroll over Height to increase the value. 

Expected behaviour
The value should be changed.

Actual behaviour
Modo crashes.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:

13.1v1 - Windows 10 - Centos 7 - MacOS 10.13 -regression

Unable to reproduce bug in:
13.0v1 - Windows 10 - Centos 7 - MacOS 10.13

Earliest version tested

13.0v1 - This issue doesn't appear in this version and has regressed.