It could just be coincidence, or it could be bub doesnt like wearing the bracelet.

My 9mth old wears the necklace, doesnt guarantee a calm happy baby but he cut a tooth without too much trauma so who knows.

And FWIW, any parenting decision you make can be supported or disproved by any number of "scientific" research papers found on Google. Doesnt mean either side is right or wrong; as a parent you have to risk assess whether whatever your researching is beneficial for you or not by figuring out how trustworthy said scientific research is.