What potential issue is the user facing with the counter resetting too frequently?

The potential issue the user is facing with the counter resetting too frequently is that the counter variable is not being stored persistently between page loads. To solve this issue, the user can store the counter variable in a session variable, which will maintain its value across different page loads.

session_start();

if(!isset($_SESSION['counter'])) {
    $_SESSION['counter'] = 0;
}

$_SESSION['counter']++;

echo "Counter: " . $_SESSION['counter'];