Steps to reproduce:
Orion's new shipped rounded tabs don't play well next to pinned tabs. The pinned tab seperator (vertical line) bleeds over into the non-pinned tab to immediate right. Also, the X close UI element should always be hidden until hovered over. It's no longer doing this.
Version 0.99.121-beta (WebKit 614.1.20)
MacBook Pro (16-inch, 2019