Could be a bent bail wire. If the wire is bent it puts to much pressure on the arms and will bind them up. Try Unscrewing the bail on the side opposite of the line roller and pull the arm off the post on the rotor. If it springs out then bend the wire so the bail arm naturally wants to line up with the post on the rotor. What happens is when you set the reel down on the deck of the boat, it pushes on the bail wire and the wire wants to spread open. Sometimes you don’t even have to take the bail apart, you can just squeeze the bail wire on the sides and it usually helps.