NC18 OnlyOffice - Close Document?

Updated NC to latest over the weekend. Colabora stopped working so I added the onlyoffice… but…

Why is there no standard, always visible, clearly identifylable, totally clickable CLOSE BUTTON?!

There is no way to close and leave a document. Sometimes there’s the “go back” button which should be a X!

The latest… 18.0.3 (stable) ?
Normally, for collaboration you have a X. And onlyoffice opens your document in another tab … Isn’t that what you got?

Yes. 18.0.3 stable

No new tab. No X. and the “Open file location” button is hardly ever visible.