Cannot select where ip=inet_pton($ip)

I have a unique column in database which is named ip

IP addresses are stored in this column as BINARY(16) (with no collation) after converting them using the PHP function

$store_ip = inet_pton($ip);

When I try to insert the same IP twice it works fine and fails because it is unique,

But when I try to select the IP it doesn't work and always returns FALSE (not found)

<?php

try {
    $ip = inet_pton($_SERVER['REMOTE_ADDR']);
    $stmt = $db->prepare("SELECT * FROM `votes` WHERE ip=?");
    $stmt->execute([$ip]);
    $get = $stmt->fetch();

    if( ! $get){
        echo 'Not found';
    }else{
        echo 'Found';
    }

    // close connection
    $get = null;
    $stmt = null;

} catch (PDOException $e) {
    error_log($e->getMessage());
}

The part where I insert the IP:

<?php

if( ! filter_var($ip, FILTER_VALIDATE_IP)){
        return FALSE;
}

$ip = inet_pton($_SERVER['REMOTE_ADDR']);

try {
    $stmt = $db->prepare("INSERT INTO votes(ip, answer) VALUES(?,?)");
    $stmt->execute([$ip, $answer]);
    $stmt = null;
} catch (PDOException $e) {
    return FALSE;
}

from Cannot select where ip=inet_pton($ip)