ID 382912 - Creating a ZDefocus node, with GPU acceleration enabled, can cause Nuke to crash when using 3 of the same GPUs

Problem summary
Creating a ZDefocus node, with GPU acceleration enabled, can cause Nuke to crash when using 3 of the same GPUs.

This has been reported when using 3x GTX 1080 Ti and has been reproduced with 3x Quadro K4200.

This issue seems to only effect the Zdefocus node and other GPU accelerated nodes (Kronos, VectorBlur, MotionBlur, etc.) seem to behave as expected.

Customer reported version
Nuke 11.3v2

Customer reported platform
windows10

Steps to reproduce

1) Open Nuke.

2) Navigate to Edit > Preferences > Hardware and make sure that 'enable multi-GPU support' is checked.

3) Create a CheckerBoard node.

4) Create a ZDefocus node and make sure 'Use GPU if available' and attach it downstream of the CheckerBoard.

Connecting the script to the Viewer should then cause Nuke to crash.

Reproduced by support

This bug has been reproduced in:
Nuke 11.3v2 - Windows 10

Nuke 11.2v5 - Windows 10

Nuke 11.2v1 - Windows 10 - Regression

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

Unable to test on other operating systems due to hardware limitations

Earliest version tested
Nuke 11.1v6
- This issue no longer appears in this version and has regressed

Expected behaviour
Creating a ZDefocus node, with GPU acceleration enabled, can cause Nuke to crash when using 3 of the same GPUs.

Actual behaviour
Creating a ZDefocus node, with GPU acceleration enabled, should not cause Nuke to crash.