Linux, GTX 1080
Broken: 2.80 (10d7ebc469b)
Short description of error
If there are zero collections in the blend file, the Outliner shows the oldest object in the scene twice.
Deleting one also removes the other. The weird thing is that deleting the collection triggers the bug, even if the object wasn't part of it, or even created after the collection was deleted.
Exact steps for others to reproduce the error
- Just delete the default Collection.
- Creating a new Collection and linking it to the scene hides all other objects in the Outliner, except this oldest one, except in View Layer mode.