As if things couldn’t get any worse for those who took the plunge and upgraded to version 1809, apparently now there’s reports of issues with ZIP files that Microsoft seemed to have been made aware of back in May! (Ugh!)
As stated by Kurt Mackie who writes for Redmond Magazine:
The problem with the October Update’s .ZIP capability, an internal file compression and decompression capability that’s built into Windows 10, was noted in a Reddit forum last week, but it’s only now acknowledged in a Microsoft community forum post. The problem affects users who tried copying zipped archive files to another folder without first unzipping the files, according to an explanation by Microsoft forum agent/moderator M. Hamer. In such cases, the copy operation seems to succeed but it actually fails.
What a mess!