The compositor doesn't run when changing node tree options. That was due to a nullptr notifier reference for RNA node tree edits. This patch uses the node tree ID for the notifier reference. Additionally, the listener code was extended to always tag the node tree when the reference is null, which converts missing updates issues like this one to superfluous updates, since it is safer. Pull Request: https://projects.blender.org/blender/blender/pulls/115532