Bitrix: strange navigation chain, how to solve the problem?

Question

PHP

Through the main page we go to the All services section (this is the name of the menu button), we get the following chain:
Home -> Services
As you can see, the section is called Services, everything works well.
We go in services to the subsection Installation, we get the following chain:
Main -> Services -> Installation
This is also normal.
But, when we go through the installation section to its subsection About installation, we get the following chain:
Main -> Services -> All services -> About installation -> Services -> Installation
Sections and components checked for their own title
What could be the reason?