You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Directory SyncArea: what it touches
ImprovementsKind: in v2.1.246,
ImprovementsSection of the release
What
Fetching the list of files to sync now retries with exponential backoff up to a set attempt budget, and only then reports the server as refused or unreachable.
Details
On exhausting the budget it emits dir_sync_manifest_unreachable carrying the error kind and the HTTP status.
Runs unconditionally in the fetch loop.
Evidence
dir_sync_manifest_unreachable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.