Deliver actionable invitations even when the sender account is unavailable instead of failing the full polling batch.
Isolate malformed records, keep sibling requests flowing, and distinguish multiple anonymous invitations by their request handles.
Add regression coverage for repeated polls, batch isolation, and anonymous-request deduplication.
Report pending group invitations through the standard OneBot request event even when their origin does not provide a live notification.
Prevent duplicate delivery when the same invitation is observed more than once, stop outstanding work with the account lifecycle, and preserve previously supported invitation behavior.
Expand group-system message queries and surface incomplete lookups instead of reporting misleading empty or not-found results.
DrSmoothl