Does player character change after resetting in game mode? (Problem with a script error)

I have a script who has a part wich does this at some part

RightShoulder = me.Character.Torso["Right Shoulder"]

Entire thing works fine, In studio, testing, everything works fine, even after resetting, But once i put it in a game to test in actual play mode, works fine, until the player resets wich is where the tool stops working, and the console shows an error saying

• Right Shoulder is not a valid member of part*

Why does that happen? It seems like something changes when resetting in game mode.

RightShoulder is a member of player.Character not player.Character.Torso

So try changing it to: RightShoulder = me.Character:findFirstChild("Right Shoulder");