I don't know what belt you're getting, but my Inzer belt is a real high quality "thick" belt and due to it's sturdiness, it doesn't bend at all or give in at any position, which means that when you bend over, it tends to jab you in the ribs and its kind of painful. HOWEVER, just like how the squats hurt your neck the first time you squat, until now, where its like there's no feeling back there, your ribs and whatever else is getting jabbed when you bend over by a sturdy belt will also adjust and then there's no more uncomfortability.
I spent something like $140 on my inzer belt and the first time I put it on and went down into a DL position, I almost gave that damn belt away on the spot. I was used to bb.com, soft belts that curve, give and bend with your body, so when I felt this inzer belt jabbin my ribs, I was like WTF. A few MONTHS later I gave it a shot just doing squats, where there was no bending over involved and when I started O-lifting, I noticed that after two or three sessions, I no longer felt the ribs pain, so just something to be mindful if you're getting a power lifting belt.