ID 488497 - Loading times are increased when the Spreadsheet Viewer tab is active while loading a specific project.

Problem summary
Loading times are increased when Spreadsheet view is active while loading a specific project.

Customer reported version
nuke.12.2v8

Customer reported platform
n_a_linux

Steps to reproduce
1) From Nuke Studio, set the Workspace to Conforming.
2) Ensure the Spreadsheet view is open, and Load the attached .hrox project file and clear any errors with ESC.
3) Observe the loading time of the project after it hits 100%. 

Expected behavior
The project should be fully loaded at 100% and display the sequence(s).

Actual behavior
The project stalls for up to 30 seconds and does not load in a timely manner when reaching 100%. The time can be increased exponentially with each open Sequence (Ctrl+DoubleClick a Sequence to open it) when saving, closing, and re-opening the project.

Workaround
Ensure that the Spreadsheet Viewer tab is not present before loading a project.

Reproduced by Support in:
NukeStudio 13.0v4 - Windows 10, macOS 10.14
NukeStudio 13.0v1 - Windows 10
NukeStudio 12.0v1 - Windows 10
NukeStudio 11.3v1 - Windows 10
NukeStudio 11.2v1 - Windows 10
NukeStudio 11.1v1 - Windows 10, macOS 10.14

Earliest version tested
NukeStudio 11.0v4 - This feature did not exist before this version (unable to load the project in previous versions.)