Son and diapers

So not baby related well kind of ,my son is 16 months and lately he has been peeing through his pamper every single night no matter how many times I change him through the night I have tried switching his brand of diapers and nothing is working in am so tired of smelling pee when I wake up in the morning I would much rather smell coffee any one can give me any advice I am all ears has anyone experience this, this has recently been happening over the pass month never had this issue before