The old behavior for the "Hide Others" operator was to show the active layer, hide the other layers and not do anything about layer groups. If the active node was a layer group, nothing would be done. This new behavior will act based on the active nodes type: - If the active node is a layer, show active layer and parenting layer groups - If the active node is a layer group, show all child nodes (layers and layer groups) and parenting layer groups Pull Request: https://projects.blender.org/blender/blender/pulls/133893