Error calculating route on toll-free highway

[Esmolante]

Recently, OM insisted in marking a stretch of highway as a toll road that was not one (which led to a miscalculation of the best route).
I guess it's because one bridge on that stretch (77594573) did not have a toll-free limit specified, while the rest of the stretch did.
There had been no changes in OSM's history for years, and other OSM-based browsers did identify themselves as toll-free.
So could it be that OM assumes the absence of a toll tag as toll: yes?