Not sure if we are supposed to post bugs in not yet finished features, but I also don’t know if “Actor scratch pad” is unfinished yet (seems like it’s wip).
In Beta 6 as soon as you open “Actor scratch pad”, most of the objects in Outliner will disappear. Restarting Rocket doesn’t help if you leave the Actor scratch pad window open. Only thing that helps is if you close it and then restart Rocket.
Beta 5 didn’t have this problem.