I was buckling my daughter into her car seat today (Britax advocate, purchased in 2014) and noticed that the chest clip comes apart with just minimal pressure (without having to press down on the little latch). You just pull it and it comes apart.

I just emailed Britax but I'm terrified that the car seat isn't safe now. Anyone else had this problem or heard of it? We will be using our spare car seat while we figure out what is going on...