To help with this issue, I used to mashed/squished some of ds' food prior to giving it to him. Items blueberries, carrots sticks, peas, corn, noodles, pasta, etc. would come up exactly the same if I don't do this. I think it is very common as they do not know to chew the food first.
One way to encourage chewing is to model it so your lo will copy you. It does look silly as you are making these exaggerated chewing motions but your lo will get it.