customer_entity table attributes are not updated

When a user changes the email address, first name or last name in the account, which is saved in the customer_entity table that data is not being updated to Magento 2. 
Current code

if (is_null($m2Id)) {
    $email2 = addslashes($customer->email);
    $condition = is_null($websiteId2) ? "email = '{$email2}' AND website_id IS NULL" : "email = '{$email2}' AND website_id = {$websiteId2}";
    $customer2 = Mage2CustomerEntity::model()->find($condition);
    if (!$customer2) {
        //add new
        $customer2 = new Mage2CustomerEntity();
        foreach ($customer2->attributes as $key => $value) {
            if (isset($customer->$key)) {
                $customer2->$key = $customer->$key;
            }
        }
        $customer2->entity_id = ($keepOriginalId) ? $customer->entity_id : null;
        //because website_id, store_id, group_id was changed
        $customer2->website_id = $websiteId2;
        $customer2->store_id = $storeId2;
        $customer2->group_id = $groupId2;
    } else {
        $canReset = UBMigrate::RESET_NO;
    }
} else {
    //update
    $customer2 = Mage2CustomerEntity::model()->find("entity_id = {$m2Id}");
    $customer2->group_id = $groupId2;
    $customer2->updated_at = $customer->updated_at;
    $customer2->is_active = $customer->is_active;
}

Correct code

if (is_null($m2Id)) {
    $email2 = addslashes($customer->email);
    $condition = is_null($websiteId2) ? "email = '{$email2}' AND website_id IS NULL" : "email = '{$email2}' AND website_id = {$websiteId2}";
    $customer2 = Mage2CustomerEntity::model()->find($condition);
    if (!$customer2) {
        //add new
        $customer2 = new Mage2CustomerEntity();
        foreach ($customer2->attributes as $key => $value) {
            if (isset($customer->$key)) {
                $customer2->$key = $customer->$key;
            }
        }
        $customer2->entity_id = ($keepOriginalId) ? $customer->entity_id : null;
        //because website_id, store_id, group_id was changed
        $customer2->website_id = $websiteId2;
        $customer2->store_id = $storeId2;
        $customer2->group_id = $groupId2;
    } else {
        $canReset = UBMigrate::RESET_NO;
    }
} else {
    //update
    $customer2 = Mage2CustomerEntity::model()->find("entity_id = {$m2Id}");
    foreach ($customer2->attributes as $key => $value) {
        if (isset($customer->$key)) {
             $customer2->$key = $customer->$key;
        }
    }
    $customer2->entity_id = ($keepOriginalId) ? $customer->entity_id : null;
    //because website_id, store_id, group_id was changed
    $customer2->website_id = $websiteId2;
    $customer2->store_id = $storeId2;
    $customer2->group_id = $groupId2;
}