ID 509311 - Mari 5.0/4.8 Python documentation is missing features present in previous versions

Problem summary
Mari 5.0/4.8 Python documentation is missing features present in previous versions
 
Customer reported version
Mari 5.0v2
 
Customer reported platform
Windows 10
 
Steps to reproduce
 
1) Launch Mari

2) Open the Python API documentation and inspect a class page e.g. mari.Layer
 
Expected behaviour
In the Mari 4.7 Python documentation, the following features were present:
1. A tree of parent class inheritance
2. A list of links to child class inheritance
3. A outline of all functions in the class
 

 
Actual behaviour
No longer present:
 

 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Mari 5.0v2 - Windows 10 - CentOS 7.9
Mari 4.8v2 - Windows 10
Mari 4.8v1 - Windows 10 - CentOS 7.9 - regression
 
Unable to reproduce bug in:
Mari 4.7v7 - Windows 10 - CentOS 7.9
 
Earliest version tested
Mari 4.7v7 - This issue doesn't appear in this version and has regressed