I'm not sure what I've done but I got orion into a very broken state that isn't fixed by closing and relaunching, it's difficult to describe precisely what's happening so I've recorded a video.
In the video I'm moving to the next tab (ctrl+tab), and some tabs are skipped, I then start closing the selected tab (cmd+w) but the tab bar doesn't react to the tab closing, then one of the tabs turns into a tab group which is just a duplication of all the currently open tabs, I then continue closing tabs (cmd+w) which eventually closes the browser because no more tabs are open even though the tab bar still shows open tabs.
I know this is probably impossible to duplicate so I'm happy to share any info
Tab bar to reflect true tab state
Version 0.99.127.2-beta (WebKit 619.1.1) Build date Apr 4 2024 Mac Studio (macOS Sonoma 14.3 build 23D56)
Sonoma (14)
Video: