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Maurice
9ecca404c5
The a/b/c shards stopped being necessary in 2022 and d has since lost its DNS record. The map never asked for d — Leaflet defaults to abc — but the offline prefetcher rotated over a to d, which is where the failing requests came from, and it cached most tiles under a host the map never requests. Presets and the prefetcher use the apex host now. A URL already saved in user_settings is rewritten where it is read and written back, so existing instances heal without a migration touching what someone typed themselves. The CSP only allowed https://*.tile.openstreetmap.org, and a wildcard host never matches the apex domain, so the prefetch fetch would have been blocked. The service worker rule had the same gap and would have stopped filling the tile cache.