I've seen the post from 15 April on "Waypoint won't snap to footpath".
Similarly, there are several places where the routes I've been planning won't snap to follow National Cycle Routes. I've also checked these on OS Maps and they are bridleways open to non motorised traffic, not footpaths. One example is the NCR 41 and 442 east of Badsey, Worcs. (https://cycle.travel/map/journey/151431 - the route snaps to the B4035 via Bretforton rather than following NCR route). Another example is the NCR 48 heading NW from Stow on the Wold (route snaps to A429 and road to Broadwell and won't snap to the NCR).
I can understand that some routes won't snap to paths that aren't meant for bikes, but it would be good if the system would recognise all NCRs.