The previous fix silenced tile errors, which made flutter_map count a failed
tile as a loaded transparent one, so it was never fetched again. Errors now
reach the layer, and OsmTileLayer rebuilds itself a few seconds after a
failure: loaded tiles come back from the image cache and only the failed ones
are requested again. Seen on the tablet, whose 2.4 GHz Wi-Fi loses a fifth of
its packets next to the OcuSync remote.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>