If I edit https://en.wikipedia.org/wiki/American_Bank_Note_Company_Printing_Plant with the Visual Editor, when I save my changes, I get a second "Publish changes" dialog, asking me to save the same changes again. When I look at the page and/or page history, I can see that my first save has been completed.
See earlier thread here for background.
It seems to be completely reproducible on this page, and I'm not seeing this on any other page. I asked another editor to try on their machine and they were able to reproduce this behavior with this edit.
MacOS 10.13.6 (17G11023)
Chrome Version 80.0.3987.163 (Official Build) (64-bit)
The other editor who testing this was also using Chrome / MacOS, but not sure the exact versions.
I don't know if this is related, but once, earlier today, I got, "Error contacting the Parsoid/RESTBase server (HTTP 404)".