A marker left on the invoking session name by a killed create/resume was pruned before herdr was asked, so a retry under the same name took it over while the orphaned pane was still alive (and create's failure cleanup could then kill it). It is now kept and blocks like any other orphan until its row is registered for the attempt or herdr reports the session gone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>