I had a child that needed occupational therapy for something else but the therapist had shared with me about her job and one thing she also did was helping children learned to eat that were having issues with texture and/or tongue motion problems. It's great that you are so very observant to your childs eating. I don't know if they have the group "Babies Can't Wait" they did in Florida and Georgia and some other states. Run their name for your state and see, if so contact them and see about getting a consult. They can't get someone in the proper field to observe your child and let you know what steps to take about helping her. They also helped me get assistance for my sons therapy it's a program for children under 3 yrs of age for many kids of therapy for each state. I hope you have them if not then I would consider talking to my ped about it be proactive and your childs advocate if you feel there's a problem don't stop until you get a consult for your child, don't stop at just one person's opinion either trust your gut on your child, your inner voice knows she needs some assistance in this matter. I would say at 8 months old and have 3 kids myself she needs some help 4-6 months should be eating solid (baby food) cereal, pureed fruit, veggies, etc..
My best wishes to you.