Actually, it’s not true that there’s no retry -
Backfill always backfills the most recent posts and topics first, so they will technically be retried within the hour / a few minutes. So, I’m not very sure what “fix” you’re looking for here.
Being on v2026.4.0-latest is good. There could be AI agent updates that are just not backported due to the sheer speed of how AI APIs are evolving.