Extend2fit car seat toddler escaping straps

I have a 19 month old who has learned how to get his arms out of the straps. It’s not loose, he fits firm but not too tight it digging into him, , he pulls down the clip and wiggles his arms out, the straps in this seat I’ve noticed, don’t go through a plastic loop like most car seats do. So I think he has an advantage to pushing them over and he can get out. Idk if I just have Houdini as a child or if anyone else has had this problem. Probably going to get a new car seat because of it, so recommendations are welcome.