Control Syncthing when on different wifi networks

I'm on a M1 MacBook Pro Monterey version 12.1 (21C52)
I'm using syncthing-macos version 1.18.5-1

I'm trying to safely shutdown Syncthing from the terminal and I can't get it to work. I'm a new Mac user, so it's hard for me to know if this is just user error or if I've found a bug.

When I input:
CURL -X POST -H "X-API-Key:" http://127.0.0.1:8384/rest/system/shutdown
It outputs
{"ok": "shutting down"}

So I know the command was correct, but syncthing doesn't actually shutdown.
Sometimes the syncthing-macos menu bar icon very briefly shows syncthing as offline, so I'm wondering if syncthing-macos is restarting syncthing.

Does syncthing-macos automatically restart syncthing if it detects it's not running, even if syncthing got a valid shutdown command?

Is this it's intended behavior?

I also tried to add pkill syncthing after the shutdown command to kill syncthing-macos before it restarts syncthing, but pkill syncthing doesn't seem to actually kill the app.

No source files or tests are named. Start by reproducing the REST shutdown request from the terminal and observe the syncthing-macos menu bar icon and process state; determine whether the application restarts Syncthing after a valid shutdown. Done means the intended behavior is established and the shutdown behavior is corrected or clearly documented.