Woocommerce + qTranslate-X attributes are not saved after product update

i am using:

WooCommerce – Version 2.5.5

WooCommerce & qTranslate-X – Version 1.3.1

qTranslate-X – Version 3.4.6.7

It's a fresh installation.

After setting up custom product attributes (also normal product attributes), saving them and publishing the product they disappear. Without qTranslate-X activated everything is working normally.

I found a lot about not translated attributes, but no information about not shown attribues at all.

• php memory is not a problem, i already checked it,
• i downgraded all plugins and reinstalled them
• i deleted all attributes and products and reseted them

via Chebli Mohamed