Subject of the issue

The service should tell systemd whether a reload, startup etc. was successful/finished. Either dbus (see example https://www.freedesktop.org/software/systemd/man/systemd.service.html#ExecReload= ) or sd_notify (https://www.freedesktop.org/software/systemd/man/sd_notify.html, e.g https://github.com/coreos/go-systemd) are likely the best options (although I never used any of them)