The UserAgent field in events and logs shows the version of the VMware.VimAutomation.Core module, not the version linked to the VMware.PowerCLI module.
With the incremental releases, the version of the VMware.VimAutomation.Core module might stay the same, while the version of VMware.PowerCLI module changes with each release.
For audit purposes, and problem diagnostics, it would be better to show the version of the VMware.PowerCLI module.