X_FETCH_DEADLINE_PIN_UNEXPLAINED
Means
a package's unsignalled-fetch pin has a blank reason
Typical cause
a count with no sentence names nothing that ends the call; the count is not honoured, so the sites are reported behind it
Fix
write what ends each call in scripts/lib/fetch-deadline-pins.ts, or move each to outbound() and run bun run scripts/fetch-deadline.ts --unpin <package>