I regret to announce that a now-reverted changeset on OpenStreetMap may have caused the issue. This poses serious questions about the protection of OpenStreetMap data from malicious edits like these, particularly when political discourse is at record levels of toxicity.
Comment from Piskvor on 30 August 2018 at 16:58
Yup. And reverted in short order - constant vigilance and whatnot. https://blog.openstreetmap.org/2018/08/30/osm-condemns-vandalism/