When plugin is activated we do not receive the purchased variant and the custo..

We have the PRO version of this plugin, when it is activated we are unable to receive the variant size selected and the customer pays for the cheapest of all variants.
This has resulted in us disabling this plugin until further notice because we are losing revenue and have to contact every customer independently to inquire about what they purchased..

We have troubleshot many plugins and are sure that this plugin is the problem at this point.

Please provide us with a solution.