This route https://cycle.travel/map?from=Newton%20St%20Faith&to=Norwich&fromLL=52.704739149999995,1.2830215857442182&toLL=52.628606,1.29227
point 4 on the turn by turn takes you onto Beck Lane. This is a ford, it is often too deep for cycling. OSM has it as a ford - so doesn't need amending. You might want to block that off on your route planning machine.
PS Love the site, it is so useful.