Incorrect Bus Stop Naptan AtcoCode

I have come across conflicting data for a Bus Stop in Bickley. According to naptan it should be 4900185590 but it is currently 490018559E1 in, and tfl journey planner API. Stop SMS code is 53335.

I’m not sure if it’s just my end or the tfl API getting very upset by me trying to get the arrivals data up for this stop?