Steps to regenerate:
1) Go to party component.
2) Go to Invitation screen.
3) Create an invitation with the To Name field filled.
Name (firstName, middleName, lastName) from Person entity is saved instead of entered To Name.
Code snippet from "createPartyInvitation" service used to create party invitation.
1) Remove "To Name" field from the Create form.
2) Remove that code snippet from the service which is setting toName.
3) Neither remove field from the form nor code snippet. If the toName is not passed from the UI then only used code snippet to set toName.