ID 434241 - A displacement effect in this scene file massively affects render time.

Problem summary
A displacement effect in this scene file massively affects render time.

Customer reported version
modo.14.0v1

Customer reported platform
10.13

Steps to reproduce

1) Download and open the attached Scene file.
2) Render the scene file and notice that the render progresses as expected. 
3) Go to the Shader Tree and enable the Vector Bozo displacement.

4) Render the scene again and notice that it doesn't seem to progress.

Expected behaviour

The render would take longer but it would at least progress.

Actual behaviour
The render doesn't seem to progress.

Workaround
Unknown. 

Reproduced by support

This bug has been reproduced in:
14.0v1 - Windows 10

13.2v1 - Windows 10

13.1v1 - Windows 10

13.0v1 - Windows 10

12.2v2 - Windows 10

12.1v2 - Windows 10

12.0v1 - Windows 10

11.2v3 - Windows 10

11.1v1 - Windows 10

11.0v3 - Windows 10

10.2v4 - Windows 10

Earliest version tested

10.2v4 - This issue appears to be in all versions of the product.