Sometimes a user may want to close all existing tabs in a given group and then add tabs open elsewhere to that group. Based on my experience this morning, it seems that Brave automatically deletes groups that have become empty. It would be very convenient not to have to recreate the group from scratch and then drag it back to its preferred position on the tab bar. I don’t think most users would object to having to manually delete a group they genuinely no longer want to use — to the contrary, I think they’d prefer to have to.
Thanks!