The deletionKeys parameter of diffObject does not correctly ignore deletion keys in inner objects where the key targeted for deletion would be removed or does not exist

[aaclayton]

Comment from @dev7355608

This hasn't been fixed entirely. Nonnested delete keys don't trigger an update event anymore if the key doesn't exist:

await canvas.scene.update({ "-=akeythatdoesnotexist": null });

But nested delete keys still trigger an update. Here the second update triggers updateScene even though nothing changed.

await canvas.scene.update({ flags: { core: { test: 1 } } });
Hooks.on("updateScene", (...args) => console.log("updateScene", args[1]));
await canvas.scene.update({ flags: { core: { "-=akeythatdoesnotexist": null } } });