Just link to Reddit/r/LinkedinLunatics and lean back

Put N/a -- see attached resume. If you have a reference, they will bother to review your Resume. You already have a high value endorsement from an individual on their team, plus internal hiring bonuses are good for team morale.

HR is lazy.

Do you want to work in a company where HR is lazy to even work?

Don't have the luxury to pick.

Put in N/a