@inkognito Re random bug: yup, that’s what I’m worried is the truth. Removing & re-syncing didn’t work for me.
I have managed to correct a route that was similarly inconsistent by exporting it, opening it in Plotaroute, deleting all hidden auto-created WPs in the “Directions” panel, downloading, importing to SA, etc. Tedious but so far effective for the routes I consider important enough to bother beforehand.
A fix for all? No idea. But if you’ve got such a route you’ll do again … give it a go and report back, please!