There appears to be an error on Google Maps regarding the W3 outbound (to Turnpike Lane) omitting stop 75387 (Tottenham Cemetery). It does not display any W3 buses at this stop, and instead reports the W3 as travelling nonstop from Haringey Sixth Form College to Great Cambridge Road. The stop is not currently closed and the W3 is stopping there as per usual. See here: https://goo.gl/maps/fitYUSR4WAVRBqGE9
It was working about a month ago but seems to have broken since.
I’m not familiar with the nuts and bolts of the API, so unsure whether this is an API issue – it appears correctly on the TfL website. https://tfl.gov.uk/bus/route/w3/?direction=outbound