plugin process exited error="signal: terminated"

If the parent process is managed by the systemd and the default KillSignal=SIGTERM and KillMode=control-group are set, the signal SIGTERM is also sent to the child process.

And, I found the server code does not handle SIGTERM, so it shutdown abnormally.
https://github.com/hashicorp/go-plugin/blob/v1.4.4/server.go#L432

Should it handle not only Interrupt but other signals(e.g.SIGTERM)?
Or It can not shut down the plugin properly in case of above? It must be kill with KillMode=process ?

Regarding the log level.
Prior to v1.4.3, the message logged as debug level.
In v1.4.4, log level has been changed to error.
https://github.com/hashicorp/go-plugin/blob/v1.4.4/client.go#L638-L640