I'm pretty sure, this was my mistake and indeed I used vehicle routing mode instead of pedestrian one as you suspected. I'm not able to replicate this issue, and OsmAnd+ works fine. Also the Track ID which I pasted, was the changeset ID, the right one should be 
https://www.openstreetmap.org/way/917899028
But this does not matter now, as you corrected it, so the only difference is the grade of track right now. 
Apologies for the mix-up and thanks for your patience.