Empty cart after adding products.

This is a sporadic issue that keeps re-occuring. At the moment 7 out of 8 browsers (Chrome on osX has the best results). It also works on my phone.

When I add products to the cart, then view cart it’s empty. I have done a lot of googling on this and have done the following:

1 – There is NO caching plugin installed.

2 – The host guarantees that session path is set correctly. (some people say that under “system status” page it lists the path, but on my version it doesn’t.)

3 – All WC Pages are all set correctly.

4 – WP memory is set to 64M on wp-config.php.

5 – The php memory on php.ini is 128Mb

6 – This is what’s in my php.ini:

post_max_size = 41M
upload_max_filesize = 41M
memory_limit = 128M
max_execution_time = 200
max_input_time = 200
max_input_vars = 10000
suhosin.post.max_array_index_length = 256
suhosin.post.max_totalname_length = 65535
suhosin.post.max_vars = 10000
suhosin.request.max_array_index_length = 256
suhosin.request.max_totalname_length = 65535
suhosin.request.max_vars = 10000
session.save_path = /tmp

7 – “Enable AJAX add to cart buttons on archives” is turned off

8 – I’ve tested it logged as admin and logged out of wp-admin.

9 – PHP is running as an Apache module on the server.

10 – I have reset “WC Transients”, “Expired Transients”, “Term counts” and “Customer Sessions” until System Status > Tools.

11 – I have delete the sites cookies on my site, and the “woocommerce_cart_hash” & “woocommerce_items_in_cart” are being resaved.

What I have noticed, which may or may not be related, is that in the header bar I have the cart widget. So before I add anything it show a cart graphic subtitle: £0 then two links to cart and checkout.

After I add to cart, I set the default “XYZ was successfully added to your cart. View Cart” message. BUT the header widget now only shows the two links – the sub total has vanished.

Looking at the code in the “header-cart-info” div it was:

<p id="noitems" class="total">
	<strong>Subtotal:</strong>
	<span class="amount">£0</span>
</p>
<div class="widget_shopping_cart_content">
	<p class="total">
		<strong>Subtotal:</strong>
		<span class="amount">£0</span>
	</p>
</div>

now it’s:

<p id="noitems" class="total hidden">
	<strong>Subtotal:</strong>
	<span class="amount">£0</span>
</p>
<ul class="cart_list product_list_widget ">
	<li class="empty">No products in the cart.</li>
</ul>
<div class="widget_shopping_cart_content">
	<!-- end product list -->
</div>

Annoyingly as I write this it has started working across all my browsers – it has been not working for the past 8 hours (that I know of). This is the second time, that I know of, that we have had this issue and I’m sure it will happen again.

Anyone with any thoughts?

https://ww.wp.xz.cn/plugins/woocommerce/