I've recently had issues with two URLs:
Both are dead, but (presumably due to incorrect HTTP response codes returned) were initially treated as alive by the bot. I then manually marked them as dead, but they have since reset to "Subscription site" and cannot be changed. This could be due to a domain level lock, but the code does not currently show me that. If that turns out to be the case, then this ticket is a feature request for displaying details of a domain-wide lock to unprivileged users, and for some facility to report these errors.