The issue is that in 1809, overwriting files by extracting from an archive using File Explorer doesn’t result in an overwrite prompt dialogue and also doesn’t replace any files at all; it just fails silently. There are also some reports that it did overwrite items, but did so silently without asking. Numerous reports about the issue here:
https://www.reddit.com/r/Windows10/comments/9phh1v/ever_since_the_october_update_the_overwrite/