I added a path alongside The Westoe public house here https://graphhopper.com/maps/?point=54.987002%2C-1.422139&point=54.987523%2C-1.42289&locale=en-US&vehicle=foot&weighting=fastest&elevation=true&use_miles=false&layer=OpenStreetMap on 24th December. It displayed in OSM and GraphHopper maps the same day. I have attempted to route via this path as late as this morning. It continues not to do so. It is connected properly at both ends and its attributes, foot=yes and highway=footway, should allow a walking or hiking route to be calculated. I wonder: is GraphHopper routing data updated periodically, only? Or what else might be at issue?
It is usually updated every 24h (usually a lot faster like 12h). Please keep in mind that this still could mean a delay of twice this time when an update is visible. It looks like it is working now (?)
All is well, as you suggest. I must remember to watch the import date in future.
I offer my best wishes for 2018. I shall continue to use GraphHopper for route planning on my PC and navigating in Locus Map Pro on my 'phone as my number one choice.
Nice to hear this and all the best too!