Up-to-date ESET Internet security (184.108.40.206)
"Setup / Advenced setup / Microsoft Windows Update / Notify about Microsoft Windows system updates" is set to "Recommended udates". Yet, ESET keeps notifying me about KB4568831, a Cumulative Update Preview which appears under the "Optional updates" section of "Windows Update" in "Settings" of Windows 10.
Note also that preview updates are what their name suggests: not fully tested updates, not recommended to use by the general public.
Is this a bug in ESET or does Microsoft incorrectly classify this particular update in some