I was unaware of that, thanks for letting me know. I'll keep it in mind for the future.

I was going off of the public_transport=platform page on the OSM wiki when mapping: it stated that the area tag was not required. It does however, conradict the platform=railway page ,which states that the area tag is necessary. 

If you know more about it and want to spread the word you may wish to edit or add to the OSM wiki pages, and/or inform someone responsible for the rendering of the map (if this is in fact a bug).