ID 527103 - The Hiero developer custom_guides.py only works in the Nuke Path, not in the Hiero Python/Startup or Python/StartupUI directories

Problem summary
The Hiero developer custom_guides.py only works in the Nuke Path, not in the Hiero Python/Startup or Python/StartupUI directories 
 
Customer reported version
hiero.13.2v5
 
Customer reported platform
 
Steps to reproduce
 
1) Download the custom_guides.py from the Hiero Python Guide: https://learn.foundry.com/hiero/developers/latest/HieroPythonDevGuide/examples/index.html
 
2) Save it to ~/.nuke/Python/Startup
 
3) Open Hiero
 
4) Check the Viewer's guides and masks, it should contain Custom Title Safe and Cinemascope 2:1
 
Expected behaviour
For the Hiero Python code to work in the ~/.nuke/Python/Startup  or ~/.nuke/Python/StartupUI directory

 
Actual behaviour
The original guides and masks are still there:

 
Workaround
Put the Hiero custom_guides.py example in the Nuke Path, like in the ~/.nuke directory
 
Reproduced by support
This bug has been reproduced in:
Hiero 14.0v1 - Windows 10, CentOS 7, macOS Monterey
Hiero 13.2v1 - Windows 10
Hiero 13.1v1 - Windows 10, CentOS 7, macOS Monterey - regression
 
Unable to reproduce in:
 
Hiero 13.0v10 - Windows 10, CentOS 7, macOS Monterey