ID 597952 - Changing knobs in the Node Graph in Nuke Studio can cause the monitor out display to flip upside down

Problem summary
Changing knobs in the Node Graph in Nuke Studio can cause the monitor out display to flip upside down
 
This only seems to happen with BlackMagic monitor out hardware at 12 bit, and only applies to the comp monitor out display, the timeline monitor out image is the correct way up
 
Customer reported version
nuke.16.0v1
 
Customer reported platform
Linux
 
Steps to reproduce
 
1) Launch Nuke Studio
 
2) Select Window>Viewer Monitor Out then click the cog to open the GlobalMonitorOut properties
 
3) Set the Display Mode to HD 1920 x 1080 - 24p (have also seen the issue with 2K 2048 x 1080 - 24p) and set the Pixel Format to 12 bit RGB 4:4:4
 
4) Import footage and add it to a sequence
 
5) Right click the track item>Create Comp>Create Comp
 
6) Open the comp in the Nuke Studio session
 
7) Make a Grade node and add it to the main comp
 
8) Quickly change the knob values, the monitor out display shows the changes as expected
 
9) Change to the Sequence panel, and scrub the timeline, monitor out display shows the changes as expected
 
10) Switch back to the Node Graph, and quickly change knob values on the Grade noed, sometimes the monitor out disapply image will appear flipped upside down. This may take a few attempts, somethime making new comps or bouncing between the timeline and node graph helps it to happen
 
Expected behaviour
The the monitor out disapply to show the correct image
 
Actual behaviour
Sometimes when comping, the monitor out display will flip upside down:

 
Workaround
Changing to 10 bit output seems to prevent the issue
 
Reproduced by support
This bug has been reproduced in:
Nuke 16.0v1 - Windows 10 - Decklink 4k Extreme - Driver 14.2.1.0 - regression
 
Unable to reproduce bug in:
Nuke 15.2v1 - Windows 10 - Decklink 4k Extreme - Driver 14.2.1.0
 
Earliest version tested
Nuke 15.2v1 - This issue doesn't appear in this version and has regressed