Male kitten peeing on my comforter, pillows, everywhere in house soft?

I have a male kitten who uses the liter box. He is peeing only on soft things, a pillow I had on the floor, my comforter on my bed. I am not sure why? I he has 2 sisters he is the only one doing this. I have mom as well and dad goes in and out of the house the mom and kittens stay inside. Does he have a bladder issue? lol. Litter box is clean, fresh water, love my kittens don’t want to get rid of.
Thank You, Mare