And as a bonus minor UI bug, the background of the Scene label does not darken like other drag-and-drop targets, such as collections or other objects.
Drag it into Scene.001, not Scene Collection
I work with linking quite a lot and I'm able to make it work in a way that's stable (with the occasional bug that gets reported and fixed), although I don't usually have other team members messing…
Your cube object in its library already has an animation data defined.
Apology for maybe a dumb question, but where is this animation data, exactly?
Ok so I figured out how I got the cube to be directly linked. It involves creating an override on nested_higher, then one on nested_lower, then undoing a few times. Should I create another issue?
Actually, when I recreated it, it is Indirect. Weird. I don't know what happened the first time then. The crash still happens regardless though.
Have you tried recreating this setup from scratch? I recreated it just now to make sure I didn't do something weird the first time, and I get the exact same result. nested_lower is the Cube…