I tried 4.9 many months ago, and it had a bug where it froze when you drag and dropped a figure in the scene tab into a group (using the ponderous "change figure parent" via context menu works fine). I tried it again today, and 4.9 STILL has the same problem.
DS breaks out of it about 30 seconds later, but it's pretty sad that people get paid to let stuff like this remain in the software.
(No, I didn't report the bug. YOU report it.)