In reply to Martin McKenna - Rockfax:
I noticed similar issues with specific topos at the Roaches last weekend. Some screenshots attached. Other buttresses there displayed normally. Though for a lot of routes there's no longer any indication of length, presumably because the guide they're taken from is old enough to pre-date the switch from displaying lengths on each route to just putting spot heights at the top of sections of crag. Not generally a problem on grit, but it can still be useful info occasionally.