ID 428258 - Nuke freezes when commenting out the last line of the Script Editor

Problem summary
Nuke freezes when commenting out the last line of the Script Editor. 

This issue only occurs when using the Ctrl+/ hotkey.

Customer reported version
Nuke 11.3v6

Customer reported platform
macOS 10.11

Steps to reproduce

1) Open Nuke.

2) Open the Script Editor and type anything into the first line.

3) Highlight the line and press Ctrl+/ to comment it out.

Expected behaviour
The line should be commented out. For example: #print "hello world"

Actual behaviour
Nuke freezes when commenting out the last line of the Script Editor.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:
Nuke 12.1v1 - Windows 10 - macOS 10.13 (High Sierra) - Linux CentOS 7

Nuke 12.0v1 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.0v1 - Windows 10

Nuke 9.0v1 - Windows 10 - macOS 10.13 (High Sierra)

Earliest version tested
Nuke 9.0v1
- The hotkey did not exist before this version