My chihuahua does something similar. Occasionally when I give her a treat she will "hide" the treats in plain view!
LOL Usually it's in a corner of the room, or right next to the back of the sofa, right at the foot of the dining room table or at the back corner of the TV stand. LOL I thought it was odd, but hey. She's like a little squirrel. She "hides" them and then goes back for it later.