Opcache prevents file from being added to realpath cache?

Description

realpath cache is a per process cache
opcache is a shared cache

opcache is enabled with validation 2 seconds

foo.php contains:

<?php $t = time();

bar.php contains:

$path = '../foo.php';
require_once $path;
echo $t;

var_dump( realpath_cache_get() );

with php-fpm request bar.php multiple times.

when checking realpath_cache_get() we see foo.php is added to the realpath cache
as soon as opcache has cached this require once foo.php, foo.php is removed from realpath cache - for most worker processes.

Questions:

1. opcache seems to be able to clear the realpath cache for some (?) workers - how is opcache able to do that? or does this happen on every request separately? (how come that foo.php is still in realpath cache for some workers though?)

2. no matter what (is_file, realpath,...) calls with ../foo.php will never make it populate realpath cache again with this file, once it's in opcache - even when calling clearstatcache before it because the file is potentially deleted beforehand. It always seems to fetch the full path again from disk instead of storing it in realpath?

PHP Version

8.3

Operating System

No response

Reproduce el comportamiento con foo.php y bar.php bajo php-fpm, usando require_once, realpath_cache_get(), is_file(), realpath() y clearstatcache(), con la validación de opcache habilitada. Compara los resultados entre procesos worker y rastrea la interacción entre opcache y realpath-cache; se considera terminado cuando se expliquen los distintos contenidos de la caché y el fallo al volver a poblar la caché, o se identifique una corrección confirmada.