Lost all interest in solids

So my son was doing really well on purées when I first started him about a month and a half ago. He would have about two servings a day.

He’s 7 months now and for the past couple of weeks or so he has completely stopped eating solids :( I still offer them but he just won’t open his mouth. Or he’ll have a few bites then be done with it.

Should I be worried ? I know he’s still young but I don’t get why he used to love them and now just doesn’t care for it.

I do plan on asking his pediatrician but was curious to know whether some of your kids were doing the same.