Shipping methods not loading or saving after update to wc3

Situation
This concerns a custom WordPress theme, which uses a 1-page checkout page. The customer is able to change shipping methods on this checkout page, which triggers two ajax requests:

• ?wc-ajax=update_order_review
• ?wc-ajax=update_shipping_method

The following code is used to re-render the shipping methods after an ajax call. (Re-rendering is required, as one of the options is local_pickup, which also displays a selectbox with the various delivery locations.)

add_filter('woocommerce_update_order_review_fragments', [$this, 'add_shippingmethods_ajax'], 10);

	function add_shippingmethods_ajax($data) {
			ob_start();
			wc_cart_totals_shipping_html();
			$woocommerce_shipping_html = ob_get_clean();
			$data[".woocommerce-checkout-shipping"] = $woocommerce_shipping_html ;
			return $data;
	}

Problem:
This worked fine with WC2.0, but WC3.0 no longer displays any shipping methods in the cart/cart-shipping.htm template. “available_methods” always seems to be null.

The shipping methods can be loaded however by adding the following code on top of the cart-shipping.htm template:

$Shipping = new WC_Shipping();
$available_methods = $Shipping->get_shipping_methods();

When submitting the form, the chosen method isn’t stored though. I’ve backtraced the code to class-wc-ajax.php update_shipping_method(). This method does seem to store the correct value using
WC()->session->set( 'chosen_shipping_methods', $chosen_shipping_methods );
Directly using WC()->session->get( ‘chosen_shipping_methods’ ) below this line, returns the correct chosen shipping method. This value seems to be overridden though somewhere later in the code by an empty value, but I can’t figure out where or why.

I’ve double checked my custom cart/cart-shipping.htm template, which seems to use identical code to the original WC3 template

I’m suspecting this is caused by a change in how shipping data is handled between WC2 and WC3. Could anyone point me in the right direction?

### WordPress Environment ###

Home URL: https://localhost
Site URL: https://localhost
WC Version: 3.4.6
Log Directory Writable: ?
WP Version: 4.9.8
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: nl_NL
External object cache: –

### Server Environment ###

Server Info: Apache/2.4.29 (Debian)
PHP Version: 7.1.23-2+0~20181015120514.8+stretch~1.gbpab65a0 - We raden je aan om PHP-versie 7.2 of hoger te gebruiken voor betere prestaties en beveiliging. Hoe je PHP-versie bijwerken
PHP Post Max Size: 128 MB
PHP Time Limit: 30
PHP Max Input Vars: 10000
cURL Version: 7.52.1
OpenSSL/1.0.2l

SUHOSIN Installed: –
MySQL Version: 5.5.5-10.1.26-MariaDB-0+deb9u1
Max Upload Size: 128 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 3.4.6
WC Database Prefix: wp_
MaxMind GeoIP Database: ? De MaxMind GeoIP Database bestaat niet - Geolocation zal niet werken. Je kunt het handmatig downloaden en installeren vanaf https://dev.maxmind.com/geoip/geoip2/geolite2/ naar het pad: . Scrol naar beneden naar "Downloads" en download het bestand "MaxMind DB binary
gzipped" naast "GeoLite2 Country". Vergeet GeoLite2-Country_xxxxxxxx.tar.gz niet te decomprimeren en alleen het GeoLite2-Country.mmdb bestand te uploaden.

Totale databasegrootte: 14.71MB
Database datagrootte: 12.54MB
Database index grootte: 2.17MB
wp_woocommerce_sessions: Data: 0.03MB + Index: 0.00MB
wp_woocommerce_api_keys: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_attribute_taxonomies: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_downloadable_product_permissions: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_order_items: Data: 0.01MB + Index: 0.01MB
wp_woocommerce_order_itemmeta: Data: 0.04MB + Index: 0.04MB
wp_woocommerce_tax_rates: Data: 0.00MB + Index: 0.01MB
wp_woocommerce_tax_rate_locations: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_shipping_zones: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_shipping_zone_locations: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_shipping_zone_methods: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_payment_tokens: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_payment_tokenmeta: Data: 0.00MB + Index: 0.00MB
wp_woocommerce_log: Data: 0.00MB + Index: 0.00MB
bandwidth: Data: 0.05MB + Index: 0.00MB
bandwidthtype: Data: 0.02MB + Index: 0.00MB
blacklist: Data: 0.02MB + Index: 0.03MB
campaign: Data: 0.02MB + Index: 0.02MB
dataset: Data: 0.02MB + Index: 0.02MB
datasetcolumn: Data: 0.02MB + Index: 0.02MB
datasetcolumntype: Data: 0.02MB + Index: 0.00MB
datasetdata: Data: 0.02MB + Index: 0.02MB
datatype: Data: 0.02MB + Index: 0.00MB
display: Data: 0.06MB + Index: 0.02MB
displaygroup: Data: 0.02MB + Index: 0.00MB
displayprofile: Data: 0.02MB + Index: 0.00MB
file: Data: 0.02MB + Index: 0.02MB
group: Data: 0.02MB + Index: 0.00MB
help: Data: 0.02MB + Index: 0.00MB
layout: Data: 0.13MB + Index: 0.00MB
lkcampaigngroup: Data: 0.02MB + Index: 0.03MB
lkcampaignlayout: Data: 0.02MB + Index: 0.03MB
lkdatasetgroup: Data: 0.02MB + Index: 0.03MB
lkdatasetlayout: Data: 0.02MB + Index: 0.00MB
lkdisplaydg: Data: 0.02MB + Index: 0.03MB
lkdisplaygroupgroup: Data: 0.02MB + Index: 0.03MB
lklayoutmedia: Data: 0.02MB + Index: 0.03MB
lklayoutmediagroup: Data: 0.02MB + Index: 0.03MB
lklayoutregiongroup: Data: 0.02MB + Index: 0.03MB
lkmediadisplaygroup: Data: 0.02MB + Index: 0.00MB
lkmediagroup: Data: 0.02MB + Index: 0.03MB
lkmenuitemgroup: Data: 0.02MB + Index: 0.03MB
lkpagegroup: Data: 0.02MB + Index: 0.03MB
lktaglayout: Data: 0.02MB + Index: 0.00MB
lktagmedia: Data: 0.02MB + Index: 0.00MB
lkusergroup: Data: 0.02MB + Index: 0.03MB
log: Data: 9.06MB + Index: 0.62MB
media: Data: 0.05MB + Index: 0.00MB
menu: Data: 0.02MB + Index: 0.02MB
menuitem: Data: 0.02MB + Index: 0.03MB
module: Data: 0.02MB + Index: 0.00MB
oauth_log: Data: 0.02MB + Index: 0.08MB
oauth_server_nonce: Data: 0.02MB + Index: 0.02MB
oauth_server_registry: Data: 0.02MB + Index: 0.03MB
oauth_server_token: Data: 0.02MB + Index: 0.06MB
pagegroup: Data: 0.02MB + Index: 0.00MB
pages: Data: 0.02MB + Index: 0.02MB
resolution: Data: 0.02MB + Index: 0.00MB
schedule: Data: 0.02MB + Index: 0.02MB
schedule_detail: Data: 0.02MB + Index: 0.03MB
session: Data: 0.00MB + Index: 0.00MB
setting: Data: 0.02MB + Index: 0.00MB
stat: Data: 0.09MB + Index: 0.05MB
tag: Data: 0.02MB + Index: 0.00MB
transition: Data: 0.00MB + Index: 0.00MB
user: Data: 0.02MB + Index: 0.02MB
usertype: Data: 0.02MB + Index: 0.00MB
version: Data: 0.00MB + Index: 0.00MB
wp_commentmeta: Data: 0.00MB + Index: 0.00MB
wp_comments: Data: 0.01MB + Index: 0.01MB
wp_hook_list: Data: 0.00MB + Index: 0.00MB
wp_links: Data: 0.00MB + Index: 0.00MB
wp_options: Data: 0.82MB + Index: 0.08MB
wp_pay_options: Data: 0.00MB + Index: 0.00MB
wp_pay_option_subs: Data: 0.00MB + Index: 0.00MB
wp_pay_transactions: Data: 0.00MB + Index: 0.00MB
wp_postmeta: Data: 0.50MB + Index: 0.20MB
wp_posts: Data: 0.60MB + Index: 0.06MB
wp_relevanssi: Data: 0.11MB + Index: 0.23MB
wp_relevanssi_log: Data: 0.00MB + Index: 0.00MB
wp_relevanssi_stopwords: Data: 0.00MB + Index: 0.00MB
wp_termmeta: Data: 0.00MB + Index: 0.00MB
wp_terms: Data: 0.00MB + Index: 0.00MB
wp_term_relationships: Data: 0.00MB + Index: 0.01MB
wp_term_taxonomy: Data: 0.00MB + Index: 0.00MB
wp_usermeta: Data: 0.03MB + Index: 0.01MB
wp_users: Data: 0.00MB + Index: 0.00MB
wp_wcpdf_invoice_number: Data: 0.00MB + Index: 0.00MB
wp_wc_download_log: Data: 0.00MB + Index: 0.00MB
wp_wc_webhooks: Data: 0.00MB + Index: 0.00MB
xmdsnonce: Data: 0.05MB + Index: 0.00MB

### Post Type Counts ###

attachment: 218
hrf_faq: 12
ml-slider: 2
nav_menu_item: 9
page: 20
post: 12
product: 55
product_variation: 22
revision: 184
shop_order: 32
wccpf: 8
wpcf7_contact_form: 1

### Security ###

Secure connection (HTTPS): ?
					Jouw winkel gebruikt geen HTTPS. Leer meer over HTTPS en SSL-certificaten.
Hide errors from visitors: ?

### Active Plugins (15) ###

Akismet Anti-Spam: door Automattic – 4.0.8
Contact Form 7: door Takayuki Miyoshi – 5.0.4
Easy WP SMTP: door wpecommerce
alexanderfoxc – 1.3.7

Enable Media Replace: door ShortPixel – 3.2.7
HTML5 Responsive FAQ: door Aman Verma – 2.5.5
Laravel DD for WordPress: door Peter Hegman – 1.0.1
MetaSlider: door Team Updraft – 3.9.1
Relevanssi: door Mikko Saari – 3.6.1
Responsive Lightbox: door dFactory – 1.7.2
Site Offline or Coming Soon: door wpecommerce – 1.6.6
Sucuri Security - Auditing, Malware Scanner and Hardening: door Sucuri Inc. – 1.8.18
WooCommerce - Store Exporter: door Visser Labs – 2.0.2
WooCommerce PDF Invoices & Packing Slips: door Ewout Fernhout – 2.1.10
WooCommerce Shortcodes: door WooThemes
Claudio Sanches – 1.0.0 – Niet getest met de actieve versie van WooCommerce

WooCommerce: door Automattic – 3.4.6

### Settings ###

API Enabled: ?
Force SSL: –
Currency: EUR (€)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

### WC Pages ###

Winkelbasis: #4 - /webshop/
Winkelmand: #5 - /winkelmand/
Afrekenen: #6 - /afrekenen/
Mijn account: #7 - /mijn-account/
Algemene voorwaarden: #177 - /webshop/algemene-voorwaarden/

### Theme ###

Name: ms-dev Chocolaterie
Version: 1.0
Author URL: VE
Child Theme: ? – Als je wijzigingen aanbrengt in WooCommerce of in een hoofdthema dat je niet zelf gebouwd hebt
raden we het gebruik van een child thema aan. Zie: Hoe maak je een child thema

WooCommerce Support: ?

### Templates ###

Archive Template: Jouw thema heeft een woocommerce.php bestand. Je zal het woocommerce/archive-product.php template niet kunnen overschrijven omdat woocommerce.php prioriteit heeft over archive-product.php. Dit is bedoeld om weergave-problemen te voorkomen.
Overrides: ms-dev/woocommerce/archive-product.php versie 2.0.0 is verouderd. De hoofdversie is 3.4.0
ms-dev/woocommerce/cart/cart-shipping.php versie 2.3.0 is verouderd. De hoofdversie is 3.2.0
ms-dev/woocommerce/cart/cart-totals.php
ms-dev/woocommerce/cart/cart.php versie 2.3.8 is verouderd. De hoofdversie is 3.4.0
ms-dev/woocommerce/checkout/form-billing.php versie 2.1.2 is verouderd. De hoofdversie is 3.0.9
ms-dev/woocommerce/checkout/form-checkout.php
ms-dev/woocommerce/checkout/form-shipping.php versie 2.2.0 is verouderd. De hoofdversie is 3.0.9
ms-dev/woocommerce/checkout/payment.php versie 2.4.7 is verouderd. De hoofdversie is 3.4.0
ms-dev/woocommerce/checkout/review-order.php versie 2.3.0 is verouderd. De hoofdversie is 3.3.0
ms-dev/woocommerce/checkout/thankyou.php versie 2.2.0 is verouderd. De hoofdversie is 3.2.0
ms-dev/woocommerce/content-product_cat.php versie 2.4.0 is verouderd. De hoofdversie is 2.6.1
ms-dev/woocommerce/content-single-product.php versie 1.6.4 is verouderd. De hoofdversie is 3.4.0
ms-dev/woocommerce/emails/admin-new-order.php versie 2.4.0 is verouderd. De hoofdversie is 2.5.0
ms-dev/woocommerce/emails/customer-processing-order.php versie 2.4.0 is verouderd. De hoofdversie is 2.5.0
ms-dev/woocommerce/emails/email-footer.php versie 2.0.0 is verouderd. De hoofdversie is 2.3.0
ms-dev/woocommerce/emails/email-header.php
ms-dev/woocommerce/emails/email-order-items.php versie 2.1.2 is verouderd. De hoofdversie is 3.4.0
ms-dev/woocommerce/emails/email-styles.php versie 2.3.0 is verouderd. De hoofdversie is 3.3.0
ms-dev/woocommerce/global/breadcrumb.php
ms-dev/woocommerce/loop/add-to-cart.php versie 2.1.0 is verouderd. De hoofdversie is 3.3.0
ms-dev/woocommerce/loop/loop-start.php versie 2.0.0 is verouderd. De hoofdversie is 3.3.0
ms-dev/woocommerce/loop/price.php
ms-dev/woocommerce/loop/rating.php versie 2.0.0 is verouderd. De hoofdversie is 3.0.0
ms-dev/woocommerce/loop/sale-flash.php
ms-dev/woocommerce/order/order-details-item.php versie 2.4.0 is verouderd. De hoofdversie is 3.0.0

Outdated Templates: ?
					
					
						Leer hoe te updaten