I'm using  Ubuntu 20.04 with dist apache2 and default settings :

michalarbet@pixla:~/work$ dpkg -l | grep apache
ii  apache2                                    2.4.41-4ubuntu3
          amd64        Apache HTTP Server
ii  apache2-bin                                2.4.41-4ubuntu3
          amd64        Apache HTTP Server (modules and other binary files)
ii  apache2-data                               2.4.41-4ubuntu3
          all          Apache HTTP Server (common files)
ii  apache2-utils                              2.4.41-4ubuntu3
          amd64        Apache HTTP Server (utility programs for web servers)
ii  libapache2-mod-php                         2:7.4+75
         all          server-side, HTML-embedded scripting language (Apache
2 module) (default)
ii  libapache2-mod-php7.4                      7.4.3-4ubuntu2.2
         amd64        server-side, HTML-embedded scripting language (Apache
2 module)

michalarbet@pixla:~/work$ uname -a
Linux pixla 5.4.0-40-generic #44-Ubuntu SMP Tue Jun 23 00:01:04 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux

When reproducing issue, be patient , you have to wait several iterations
before it will fail.
Some bug reports and discussion related to :

https://bugs.python.org/issue41345
https://github.com/psf/requests/issues/4664
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=899406

po 20. 7. 2020 v 14:54 odesílatel Ilia Androshchuk <report@bugs.python.org>
napsal:

>
> Ilia Androshchuk <an7e@outlook.com> added the comment:
>
> Hi Michal,
> Which version of operating system and apache are you running?
> I'll try to reproduce
>
> ----------
> nosy: +an7e
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue41345>
> _______________________________________
>