I have a 3 speed Raleigh cruiser that has a Sturmey Archer hub. It keeps going into neutral (just spins) at times by itself and sometimes if I readjust the gear shifters, it'll be fine. Do you guys know why it's doing this and if I can fix it? Also, when I'm walking my bike, the pedals will spin when it's just beside me (when I'm not riding it but walking it).
I don't know much about internal hubs and this one is bothering me

Thanks for the help!