Question regarding Microsoft-Windows-Hyper-V-Worker Event ID 18504

Hello experts,

so, I have a question that is puzzling me regarding Microsoft-Windows-Hyper-V-Worker Event ID 18504 in a scenario where the Hyper-V Guest Shutdown Service (vmicshutdown/hv_utils) is used in order to allow the host to trigger virtual machines shutdown.

Can anybody please clarify if Event ID 18504 is written to Microsoft-Windows-Hyper-V-Worker event log:

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1. Only when a given Virtual Machine is actually shut down (i.e. the previously running workload is actually terminated on the Hyper-V host itself)
2. When the command to shut down a running Virtual Machine is issued. Because of that, it does not necessarily mean that the previously running workload is actually terminated on the Hyper-V host itself. For example, if there is an issue with the Hyper-V Integration Services service inside the Guest OS, there may be a delay or fail to shutdown the machine
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Any suggestions and thoughts will be greatly appreciated.

Thanks and Regards,

Massimiliano