The document server called accept_connect again for a Connect on an existing
key, queuing another reliable Accept each time: a resend storm, and the full
queue Err that the previous commit turned into a drop. The repeat now re-sends
the Accept still pending, or an Ack once acknowledged, as the hub does. A fresh
session's accept_connect cannot fail under validated options, so its error is
propagated again rather than counted as a drop.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>