Hi @MitchellMyParcel
We usually don't give support for 3rd party plugins but what kind of help you need here, please?
I never used your plugin and don't know what could be happening but we don't remove any field, what we do is hiding some default WC fields because every inventory has its own set of fields (so they aren't duplicated).
So, perhaps, if you are adding your custom fields within those default WC sections, they are being hidden together. Is this what is happening?
Best Regards,
Salva.