systemdは私のデーモンを再起動し続けます

WiFi / Ethernetを介してRaspberry PiをUSBトンネルとして使用する予定なので、udevを自動的にバインドし、カーネルモジュールをコンパイルして挿入するスクリプトを作成しましたが、デーモンに閉じ込められました。以前の方法は、rc.localでデーモンが起動された古いシステムで正しく機能しました。

私が追加したもの/etc/systemd/system/usbipd.service:

[Unit]
Description=usbip host daemon
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
Restart=always
ExecStart=/usr/sbin/usbipd -D

[Install]
WantedBy=multi-user.target

システムログから得た内容：

Sep  9 23:47:25 raspi-conn systemd[1]: Started usbip host daemon.
...
Sep  9 23:47:26 raspi-conn systemd[1]: usbipd.service: Succeeded.
Sep  9 23:47:27 raspi-conn systemd[1]: usbipd.service: Scheduled restart job, restart counter is at 1.
...
Sep  9 23:47:27 raspi-conn systemd[1]: Stopped usbip host daemon.
Sep  9 23:47:27 raspi-conn systemd[1]: Started usbip host daemon.
...
Sep  9 23:47:27 raspi-conn usbipd: usbipd: info: starting usbipd (usbip-utils 2.0)
Sep  9 23:47:27 raspi-conn usbipd: usbipd: info: listening on 0.0.0.0:3240
Sep  9 23:47:27 raspi-conn usbipd: usbipd: info: listening on :::3240
Sep  9 23:47:27 raspi-conn usbipd: usbipd: info: shutting down usbipd
Sep  9 23:47:27 raspi-conn systemd[1]: usbipd.service: Succeeded.
...
Sep  9 23:47:27 raspi-conn systemd[1]: usbipd.service: Scheduled restart job, restart counter is at 2.
...
Sep  9 23:47:27 raspi-conn systemd[1]: Stopped usbip host daemon.
...
Sep  9 23:47:27 raspi-conn systemd[1]: Started usbip host daemon.
...
Sep  9 23:47:28 raspi-conn usbipd: usbipd: info: starting usbipd (usbip-utils 2.0)
Sep  9 23:47:28 raspi-conn usbipd: usbipd: info: listening on 0.0.0.0:3240
Sep  9 23:47:28 raspi-conn usbipd: usbipd: info: listening on :::3240
...
Sep 10 08:15:17 raspi-conn systemd[1]: usbipd.service: State 'stop-sigterm' timed out. Killing.
Sep 10 08:15:17 raspi-conn systemd[1]: usbipd.service: Killing process 560 (usbipd) with signal SIGKILL.
Sep 10 08:15:17 raspi-conn systemd[1]: usbipd.service: Failed with result 'timeout'.
Sep 10 08:15:17 raspi-conn systemd[1]: usbipd.service: Scheduled restart job, restart counter is at 3.
Sep 10 08:15:17 raspi-conn systemd[1]: Stopped usbip host daemon.
Sep 10 08:15:17 raspi-conn systemd[1]: Started usbip host daemon.
Sep 10 08:15:17 raspi-conn usbipd: usbipd: info: starting usbipd (usbip-utils 2.0)
Sep 10 08:15:17 raspi-conn usbipd: usbipd: info: listening on 0.0.0.0:3240
Sep 10 08:15:17 raspi-conn usbipd: usbipd: info: listening on :::3240
...
Sep 10 08:16:47 raspi-conn systemd[1]: usbipd.service: State 'stop-sigterm' timed out. Killing.
Sep 10 08:16:47 raspi-conn systemd[1]: usbipd.service: Killing process 1449 (usbipd) with signal SIGKILL.
Sep 10 08:16:47 raspi-conn systemd[1]: usbipd.service: Failed with result 'timeout'.
Sep 10 08:16:47 raspi-conn systemd[1]: usbipd.service: Scheduled restart job, restart counter is at 4.
Sep 10 08:16:47 raspi-conn systemd[1]: Stopped usbip host daemon.
Sep 10 08:16:47 raspi-conn systemd[1]: Started usbip host daemon.
Sep 10 08:16:47 raspi-conn usbipd: usbipd: info: starting usbipd (usbip-utils 2.0)
Sep 10 08:16:47 raspi-conn usbipd: usbipd: info: listening on 0.0.0.0:3240
Sep 10 08:16:47 raspi-conn usbipd: usbipd: info: listening on :::3240
...
Sep 10 08:18:18 raspi-conn systemd[1]: usbipd.service: State 'stop-sigterm' timed out. Killing.
Sep 10 08:18:18 raspi-conn systemd[1]: usbipd.service: Killing process 1482 (usbipd) with signal SIGKILL.
Sep 10 08:18:18 raspi-conn systemd[1]: usbipd.service: Failed with result 'timeout'.
Sep 10 08:18:18 raspi-conn systemd[1]: usbipd.service: Scheduled restart job, restart counter is at 5.
Sep 10 08:18:18 raspi-conn systemd[1]: Stopped usbip host daemon.
Sep 10 08:18:18 raspi-conn systemd[1]: Started usbip host daemon.
Sep 10 08:18:18 raspi-conn usbipd: usbipd: info: starting usbipd (usbip-utils 2.0)
Sep 10 08:18:18 raspi-conn usbipd: usbipd: info: listening on 0.0.0.0:3240
Sep 10 08:18:18 raspi-conn usbipd: usbipd: info: listening on :::3240

私はシステム内部の経験が少なく、デバッグ方法もわかりません。プロセスが停止して再起動する明確な理由はありません。 systemdがプロセスステータスを取得できないようです。