Blowouts

Hi! I’m hoping for some advice on my new baby. My sweet 5 month old baby girl has frequent diaper blowouts. Even when the diaper isn’t full, she often has poop escape up the back. I’ve tried folding down the top edge a little but it doesn’t help. We use and generally love Millie Moons. I’m wondering if it’s worth trying a different brand of diaper or if anyone has any other ideas/suggestions!