Shutdown and Draining
The default behavior of most SDKs is to send out events over the network asynchronously in the background. This means that some events might be lost if the application shuts down unexpectedly. The SDKs provide mechanisms to cope with this.
The platform or SDK you've selected either does not support this functionality, or it is missing from documentation.
If you think this is an error, feel free to let us know on GitHub.