Steps to reproduce:
Open a link from email or somewhere else: the page loads, but there's no tab for the page. No tab is active.
Also happens when you move a tab to another group and then switch to that group. The moved page is loaded, but it doesn't have a tab and no tab is active.
Orion, OS version; hardware type:
Version 0.99.123.3-beta (WebKit 6184.108.40.206), macOS 11.7.4