Windows 10 Unblock file, unexpected behavior since upgrade to 2004

[PKersey]

I noticed since the upgrade, the following happens:

1. I download a zip file from the internet to the local downloads folder
2. I right click > properties > unblock
3. I move the file to a network share
4. I right click the file. Now I get the warning that the file might be harmful as if the file was still blocked. I cannot unblock the file. The option is missing
5. I unzip the file
6. Now every unzipped file show as blocked
7. Now I have to use PowerShell to unblock the folder recursively (Get-ChildItem -Path 'X:\...' -Recurse | Unblock-File

This should not happen I believe. Why does the file get re-blocked?

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