Sorry, I don't buy this. The vandalism only persisted in the rendered map tiles due to CDN caching. Actual map data (which is input to the geocoding) was revert

Sorry, I don't buy this. The vandalism only persisted in the rendered map tiles due to CDN caching. Actual map data (which is input to the geocoding) was reverted very quickly by the DWG (moderators). This is also possibly a violation of Tile Usage Policy, you're not supposed to use OSM infrastructure in volume. OSM data is free, but hosting not so. Either self-host or use other providers.