Hi Anh,
I do 99.9% of my editing from the front-end. I just made an edit from the backend and the validation works there as expected. I apologize for not being more clear and more timely in my communication there.
I am still getting nothing for the front-end though.
I use the front-end form in a bootstrap modal, I'm not sure if that could be the issue.
Thanks for all your help!