ID 388840 - Keyboard shortcuts do not work in the Viewer after creating roto shapes

Problem summary
Keyboard shortcuts do not work in the Viewer after creating roto shapes

Customer reported version
Nuke 11.3v3

Customer reported platform
CentOS 7

Steps to reproduce

1) Create a Roto node and create a shape in the Viewer
2) Move around the Viewer with ALT + left mouse
3) Click once in the Viewer to deselect all roto points
4) Press any shortcut on the keyboard. For example, F key to fit to screen. 

Expected behaviour
The  keyboard shortcuts should work when after creating roto shapes in the Viewer.

Actual behaviour
The keyboard shortcuts no longer work after creating roto shapes in the Viewer.

Workaround
Moving the mouse in the Viewer will make the keyboard shortcuts work again.

Reproduced by support

This bug has been reproduced in:
Nuke 11.3v3 - Windows 10 - macOS 10.13 (High Sierra) - Linux CentOS 7

Nuke 11.3v1 - Windows 10 - macOS 10.13 (High Sierra) - Linux CentOS 7 - Regression

Unable to reproduce bug in:
Nuke 11.2v5 - Windows 10 - macOS 10.13 (High Sierra) - Linux CentOS 7

Earliest version tested
Nuke 11.2v5
- This issue no longer appears in this version and has regressed