Autosummary : Modules with the package's name may hide documentation pages links

Describe the bug

If we have a module that has the package's name (For example, mytoolbox.py within mytoolbox). Then, it seems that imported modules inside mytoolbox.py are hidden, their documentation is correctly generated but no links are embedded to these documentation pages.

Consider the following package:
── mytoolbox
   ├── init.py
├── mytoolbox.py
   ├── mymodule1.py
   ├── mymodule2.py
   └── mysubpackage

If we have from mytoolbox import mymodule1 in mytoolbox.py, the documentation for mytoolbox.mymodule1 is correctly generated (mytoolbox.mymodule1.html) but there are no links to this page in the API Reference page (ie mytoolbox.html).

How to Reproduce

$ git clone https://github.com/MAJegham/Sphinx-Autosummary-Recursion.git
$ cd Sphinx-Autosummary-Recursion
$ pip install -r requirements.txt
$ cd docs
$ make html
open _build/html/_autosummary/mytoolbox.html and see a functioning link to mytoolbox.mymodule1 page

Expected behavior

have a functioning link to mytoolbox.mymodule's doc in the page _build/html/_autosummary/mytoolbox.html

Your project

https://github.com/MAJegham/Sphinx-Autosummary-Recursion

Screenshots

mytoolbox.mymodule1 (in pink) is not a link even though the page mytoolbox/mymodule1.html was correctly generated.

OS

ubuntu 20.04

Python version

3.8.10

Sphinx version

5.0.2

Sphinx extensions

autosummary, autodoc

Extra tools

No response

Additional context

No response

Reproduce the case in the linked Sphinx-Autosummary-Recursion project by running pip install -r requirements.txt, cd docs, and make html. Compare the generated _build/html/_autosummary/mytoolbox.html with mytoolbox.mymodule1.html and trace the autosummary/autodoc entry points; done means the API Reference page contains a working link to the generated module documentation.