If a contact has submitted a form previously and we have recorded the location they’re interested in as location A (using multiple checkbox) and then at a future date they submit a form again with an interest in location B, the contact property now has two locations selected.
The most recent form submission (location B) will differ from the contact property record (location A and location B). Therefore using the personalization token is not accurate.
There really should be a way to access the data for the most recent form submission.