ID 315840 - Fading cascading menu items in Nuke/NukeStudio/Hiero 11.0v1 and 11.0v2 in MacOS only

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Problem summary
There appears to be a fade between cascading toolbar selections in Nuke/Hiero/NukeStudio 11.0v1 and 11.0v2 release versions, this only happens in MacOS and not in the other OS's.

I have checked this on several different MacOS releases: 
- 10.11.4 (El Capitan)
- 10.11.6 (El Capitan)
- 10.12.6 (Sierra)
- 10.13 (High Sierra)
and happens on all of these versions.

Customer reported version
nuke.11.0v2

Customer reported platform
Mac OS 10.11

Steps to reproduce

1) Open up Nuke/NukeStudio/Hiero 11.0v1 or 11.0v2 using MacOS

2) Go to the left hand side and select a menu that has two levels of cascading menu's eg. 3D.

3) Move between selections quickly and you will see fading between the selections
Result: Fading between selections

4) Try the above steps in Nuke/NukeStudio/Hiero 10.5 release versions
Result: No Fading between selections

Workaround
Unknown.

Reproduced by support
Nuke 11.0v2 - MacOSX 10.12
Nuke 11.0v1 - MacOSX 10.12 - regression

Unable to repro on
Nuke 11.0v2 - Windows 7 - CentOS 6.9
Nuke 11.0v1 - Windows 7 - CentOS 6.9
Nuke 10.5v6 - MacOSX 10.12 - Windows 7 - CentOS 6.9

Earliest version tested
Nuke 10.5v6 - MacOSX 10.12 - Windows 7 - CentOS 6.9
- Issue no longer appears in this version and regressed in the version above

Expected behaviour
Fading between cascading selections should not differ between OS's

Actual behaviour
Fading cascading selections differ between OS's
 

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