ID 376092 - Incremental Viewer Shortcuts do not work on 'frame 1' in Nuke

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Problem summary
When on "Frame 1" within Nuke's Viewer, the keyboard shortcuts to increment frames no longer function.

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The following shortcuts do not respond:

Alt+Right Arrow - Next keyframe
Alt+Left Arrow - Previous keyframe


Ctrl+Left Arrow - Move playhead backward by 1/2 the distance from the playhead to the next keyframe (or in/out
point of there's no keyframes. Each strike recalculates the distance.
Ctrl+Right Arrow - Move playhead backward by 1/2 the distance from the playhead to the next keyframe (or in/out
point of there's no keyframes. Each strike recalculates the distance.


Shift+Left Arrow - Move playhead to the left incrementally by the amount specified in the skip frames control
Shift+Right Arrow - Moves playhead to the right incrementally by the amount specified in the skip frames control


Shift+NUM Left/Right - Nudge frames backward or forwards by the amount specified in the skip frames control


Setting the frame to any other number, will allow the shortcuts to work as expected.

This issue does not occur within NukeStudio's Sequence or comp Viewer.

Customer reported version
nuke.11.2v4

Customer reported platform
windows10

Steps to reproduce

1)  Open Nuke, Create a ColorWheel node

2)   Click into the Viewer on "Frame 50" and test the keyboard shortcuts provided above.

This should display the keyboard shortcuts working correctly.


3)  Now do the same except test from "Frame 1".

Result: The keyboard shortcuts do not increment the frames.

Workaround
Set your footage to start on a different frame, most larger studio facilities use "Frame 1001" as a standard point, so it is a generally recommended choice.

Reproduced by support

This bug has been reproduced in:
Nuke11.2v5 - Windows 7 - Mac10.13 - CentOS6.9
Nuke11.2v1 - Windows 7
Nuke11.1v1 - Windows 7
Nuke11.0v4 - Windows 7
Nuke11.0v1 - Windows 7 - Mac10.13 - CentOS6.9
Nuke10.5v1 - Windows 7 - Mac10.13 - CentOS6.9
Nuke10.0v1 - Windows 7
Nuke9.0v1 - Windows 7
Nuke8.0v1 - Windows 7 - Mac10.13 - CentOS6.9


Earliest version tested
- This issue appears to be in all versions of the product

Expected behaviour
The keyboard shortcuts should function as expected.

Actual behaviour
The keyboard shortcuts stop working until the frame is incremented once.

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