Microsoft has confirmed the bug when unpacking ZIP files (existing files are not overwritten, but nothing is reported either) in Windows 10 V1809. The bug was known to Microsoft, is even fixed in Windows 10 19H1 (Insider Preview) branch, but the users of Windows 10 V1809 needs to wait until a patch comes in November 2018 and the rollout is released again. I've added details within my blog post Windows 10 V1809: Write bug in ZIP feature
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