What changes search parameters when forming dynamic routing?

[kliatskiidenis]

Hello!
There was a task to make routing for processing such urls
example:
/cars/toyota/
/cars/toyota/camry/
/cars/toyota/2023-year/
/cars/2020-year/
/cars/rear-drive/
made such directories as in the photo

in the page.tsx file, I process the parameters from the url, bring them to the format I need, output them to the console:

at first, what I need is displayed, but after a few seconds, the same console.log is displayed, but the parameters have completely different values
an example of the console response is visible on the screen

Please tell me what is causing me to change my required data to other similar to some official directory names?