All reports of systemd-service-file-shutdown-problems for the archive. The extended description of this tag is:
The specified systemd .service file contains both DefaultDependencies=no and Conflicts=shutdown.target directives without Before=shutdown.target.
This can lead to problems during shutdown because the service may linger until the very end of shutdown sequence as nothing requests to stop it before (due to DefaultDependencies=no).
There is race condition between stopping units and systemd getting a request to exit the main loop, so it may proceed with shutdown before all pending stop jobs have been processed.
Please add Before=shutdown.target.
Refer to https://github.com/systemd/systemd/issues/11821 for details.
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