Woocommerce Order Note Conflict

Hi,
Thank you for your plugin which works great, except it generates a conflict with “Woocommerce Product Vendors” order notes. First it changes the default value in the select box from “Note to customer” to “Private note”, second it prevents adding any note to the current order.
I made the same test with Woocommerce backend oders and no problem occurred.
Tks,
Valéry