Hi,
Make sure that the name field is set to the display name: https://i.imgur.com/zL2zsyl.png
If the display name is set the same way on the wordpress back-end, it should do the trick.
If that does not work, then you can still use the {first_name} and {last_name} custom field variables in the advanced title field, like so: https://i.imgur.com/OMgYhVH.png
