Over Bluetooth every command is a write-with-response, and a companion that
restarts on the reboot command can drop the link before acknowledging the
write. The write then hung until the link supervision timeout, holding the
reboot dialog back by a second or more. The reboot now returns once the
write has had a quarter second to fail, and leaves the rest to the teardown
that follows.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>