Facebook Lead Ads: empty name fields in Marketo after submission
The Issue:
Our FB Lead Ads currently use 3 fields:
- Full Name
- Company Name
However, the Full Name field isn't seen in Marketo - so they hit the database with just an email address and company.
Stranger still, if I separate the Full Name field into First and Last Name, I get the Last Name, but not the First Name, which leads me to suspect something's amiss with the First Name field.
If I go to fill the form out again on Facebook, my details (including full name) are populated, so FB remembers - just Marketo does not.
Screenshots:
Marketo's mapped fields - FB Support noted double-mapping could cause problems, so I unmapped "Full Name" when testing "First Name" and "Last Name", and I also tried mapping the converse (Full Name mapped, First+Last unmapped).

Here are the fields used in our FB Lead Ads:

Any thoughts appreciated! What are common FB Lead Ads-related issues you've seen that could be messing with this?