For some reason, in my game, i am able to pick up every object i want except my Oar prefab.
It shows in the editor scene that the object is picked up but is invisible, all i can see is the collider box and outlines
When i pick up the sword, it appears in my hand. As you can see, the Oar image is on the ground however, the collider box is in the player hands.
If im not mistaken, there is a box collider on both the GameObject(parent) and the model(child). You could try removing the collider for the parent or the child, as having a collider for both might result in some weird behaviour.