Just got instantly approved for both my wife and I. The offer appeared when my account was signed into HA's website, but wouldn't when my wife's account was used (she has the BofA Hawaiian card), got her app through using the second link below.
Here's the landing page for the app - you don't need to go through HA's website -
https://www.hawaiianairlinesbohcard....ication.action
or
https://barclaycardus.com/apply/Land...erid=PTRBAPRTL
The second link should redirect to the first one.