For the section "Using Wikimedia maps instead of geohack ?", the notifications panel links to #Using_Wikimedia_maps_instead_of_geohack.C2.A0.3F (which does not work) when it should actually link to #Using_Wikimedia_maps_instead_of_geohack_.3F.
Looks like we are not correctly normalizing whitespace here? .C2.A0 is the encoding for a non-breaking space, but the other code seems to normalize that to a space. Ideally we'd use the same code for generating section anchors that's used everywhere else, but I'm not sure if that's exposed.
This seems to be a regression kind of caused by rMW129067c907ea: Remove nbsp and similar characters from section IDs, in the sense that that commit changes the way the parser builds section IDs and we are mimicking but not using that in Echo (not sure why).