ID 426449 - VectorDistort has no viewer output when setting blur size between 22.307687 to 22.307694

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Problem summary
VectorDistort has no viewer output when setting blur size between 22.307687 to 22.307694

Customer reported version
nuke._12.0v5

Customer reported platform
centos7

Steps to reproduce

1) Open Nuke

2) Read in footage

3) Create a SmartVector node and attach footage

4) Create a VectorDistort and connect to the SmartVector node and footage

5) Make sure the VectorDistort Output is set to "warped src"

6) Change Blur in VectorDistort to a number between 22.307687 and 22.307694

7) The result should have no viewer output from the VectorDistort node

Expected behaviour
For the VectorDistort to apply the blur based on the number being input

Actual behaviour
Having Output set to "warped src" and inputting a number between 22.307687 to 22.307694 causes the viewer to output nothing

Workaround
As an alternative to using the "warped src" select the "st-map" and use that as the base for your distortion.

Reproduced by support
This bug has been reproduced in:
Nuke 12.1v1 - Windows 10 - CentOS 7 - macOS 10.14.5
Nuke 12.0v1 - Windows 10
Nuke 11.3v1 - Windows 10
Nuke 11.2v1 - Windows 10 - CentOS 7 - macOS 10.14.5 - Regression

Unable to reproduce bug in:
Nuke 11.1v6 - Windows 10

Earliest version tested
Nuke 11.1v6 - This issue doesn't appear in this version and has regressed

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