Steps to reproduce:
Open a lot of tabs and open a new one from a link on other apps.
Except the newly opened tab being "expanded", the one on its left is left expanded. Hover on the new tab does nothing and no "x" button is shown, but hovering on the left one could show "x" on that.
Orion, OS version; hardware type:
Orion: Version 0.99.113.2-beta (WebKit 613.1.12)
macOS: 12.3 (21E230)