Yes, I have; on more than one occasion. I finally decided that I refuse to chase it any longer and now just book with Hertz where I use the airline discount (they're all the same as far as the discount amount) and have any rental points booked to my airline account.
I hate to sound like such a boo bird, but at some point, one gets tired of the aggravation. This was one of those times. I never have to chase the airline to post the points.
No issues on my end, but I stopped booking Hertz due to the business I partner with uses Avis. I will have to say, I have been impressed with Hertz, considering I was a Plat level with Hertz (no longer).
Now an Avis First member and I do like it. But no issues with points posting. I am sure my profile is filled out correctly be it for Airfare, Car, Hotel. And I have my car rentals go towards my airfare program.