Why is session refreshed after page refresh?

Question

WordPress

On the local server it works as it should, on the hosting the session is constantly updated after reloading the page, tell me what is the reason?
At the top of the page I write:

session_start();
if(!isset($_SESSION['test'])) $_SESSION['test'] = 1; else echo $_SESSION['test']++;
exit;

session IDs appear in the temp folder after each page refresh

Answer 1

why do you need plugins? Or are you in the code at all? Everything is simple there