Using python 3.8.10 and the documentation https://docs.python.org/3.8/library/logging.html it seems that either the documentation is incorrect/unclear, or that the logging module does not work as described. 

Reading on the Logger Object and the setLevel method I created the attached python code, which does not work as expected. As I set the level to "DEBUG", and the documentation clearly says " Logging messages which are less severe than level will be ignored". But having set the level to DEBUG, even the more "severe" info message is ignored. That is clearly contradicting the documentation!

Logging can be quite tricky. There are filters at multiple levels. In this case, you didn't set up the "global logging" and I am guessing, by default, it only shows WARNING and above. You can fix your problem by doing:

logging.basicConfig(level=logging.DEBUG)

I was not asking for a solution or a workaround. I simply wanted to submit this bug in either the code or the documentation.

The sentence within the doc should not be considered in isolation.

The "Logger" object is *not* ignoring the message (in accordance with the documentation and your expectation), but the "Handler" is, see https://docs.python.org/3.8/library/logging.html#logging.Handler.setLevel and here: https://docs.python.org/3/howto/logging.html: "The default level is WARNING, which means that only events of this level and above will be tracked, unless the logging package is configured to do otherwise."

Logging is quite complicated, and reading the API reference is not the best starting point, as is noted at the top of the page and links provided.

As Henk-Jaap points out, this is not a bug. You can't take a single sentence or even paragraph without considering the whole picture. In particular, this section

https://docs.python.org/3/howto/logging.html#what-happens-if-no-configuration-is-provided

explains clearly why the behaviour you noticed is as expected. Another section even depicts it pictorially:

https://docs.python.org/3/howto/logging.html#logging-flow