Well, add me to the list because I am having the same problem, and, not realizing it was a software issue, my daughter lost out on a lot of money last year because TurboTax insisted that she could be claimed by someone else when she could not. Not happy either. I am currently having the same issue again in 2022, but this time I won't be taking TurboTax's word for it that I'm wrong. There truly is some kind of glitch in the software. I don't know if it is because they are assuming based on her age and income that she didn't provide more than half of her support (which she did) or if it is something else, but it needs to be dealt with.
