Stock synchronization problem

Hi,

I have a problem in a website currently in development with stock synchronization.

That’s a problem that I have since the beginning, through all updates I’ve made.

When I buy a test product in translated language, nothing happens to the stock.

It’s a desperately random problem so it’s difficult to track it, but it seems that it happens when it’s the admin who buy the product… the first time, then it works.

Like I said, it’s random so… I don’t know.

Also, what happened to this post ?
http://wordpress.org/support/topic/plugin-woocommerce-multilingual-run-woocommerce-with-wpml-stock-variation-not-synchronized-between-language?replies=2

I think it’s happening with twentythirteen theme also.

WordPress 3.8.1
Woocommerce 2.1.8
WooCommerce Multilingual 3.3
WPML 3.1.5

Thank you if you have a clue

https://wordpress.org/plugins/woocommerce-multilingual/