Operator ruling 2026-07-26: let the first backup run as long as needed; other
backups shouldn't start until finished.
A first FULL offsite snapshot runs for hours, far past max_quiesce. When that
bound elapses the app resumes (unchanged), but the loop then started the NEXT
tier while the first was still uploading. Now it breaks and defers the rest to
a later poll — vzdump still holds the guest lock, so the second start would be
refused by the agent (409, v0.99.0) or fail on the lock, and a failed backup
never satisfies a cadence, so the tier would retry into the same wall forever.
pollTier returns (phase, stillRunning, err). The app still resumes exactly once.
Red-proof observed and restored; full suite green.
Claude Code
9e5ea56853