I2C Master приемник не работает, работает только в отладчике

        if(subscription){
const key = subscription.getKey('p256dh');
            const token = subscription.getKey('auth');
            const contentEncoding = (PushManager.supportedContentEncodings || ['aesgcm'])[0];

            return fetch('/scripts/notification-subscribe.php', {
                method: 'POST',
                body: JSON.stringify({
                    endpoint: subscription.endpoint,
                    publicKey: key ? btoa(String.fromCharCode.apply(null, new Uint8Array(key))) : null,
                    authToken: token ? btoa(String.fromCharCode.apply(null, new Uint8Array(token))) : null,
                    contentEncoding,
                    user: 1,
                }),
            }).then(() => subscription);
        }
}

Just modify this function hope pushSubscription with if block it works