When closing the first Tab Group with 1 or more tabs, it causes Orion to exit. When right clicking it shows Close Window instead of just Delete like it normally would for Tab Groups.
Right now it seems like an ordering problem. The first Tab Group seems to be inheriting unique behaviors akin to a single Tab Group being open i.e. a single window with only one Tab Group. Its behavior should change when there are 2 or more Tab Groups open. The behavior of the first Tab Group should be similar to the other n +1 groups (Edit/Duplicate/Suspend/Delete, etc).
Closing a Tab Group when other groups are present should be indendent of Tab Group order and not cause Orion to close.
26.2 , Version 1.0.4 (143), WebKit 624.1.2.19.2
Tahoe (26)