For now, there is a temporary work aroun: After you've hit Command + W (and the window closes instead of the tab) do the following: Command + N (to open a new window) followed by Command + Shift + T (to re-open the last tab). This will actually open the last window you've closed including all tabs (granted it wasn't an incognito window).
Posts made by vashiru
RE: Cmd+W closes the window instead of the tab.Opera for Mac
RE: U2F registration issuesOpera for Windows
This issue is not isolated to Windows alone. The same thing occurs on Opera 54 on MacOS. I've tried it with Gitlab and Google and run into the same issues as described above.
However, if you set-up the U2F through a different browser, actual authentication with it works just fine.