Steps To Duplicate
1) Create a new individual constituent with a primary address that has the address, city, state, country, and zip all filled out, in addition to any other desired address fields.
2) Enter a primary email address and a primary phone number as well.
3) Using that existing constituent's information, register for an event in BBIS using the Event Registration Form 2.0 and do not enter anything in the Address, City, State, or Zip Code fields. Enter the constituent's name and other contact information field values exactly how they on the constituent record.
4) Download the transaction into CRM.
5) Make sure the constituent is auto-matched > Validate the batch > Commit the batch.
6) Go to the constituent record > Contact tab > Notice that the constituent's primary address is now completely blank.