I found a bug (see attachment). A "send to output window" action that references an object that doesn't exist in the frame is completely ignored. For example, one would expect this action:
to output something like this:
But because it references the red object, which doesn't exist in the current frame, the entire action is ignored and it outputs absolutely nothing. This is particularly problematic in the context of global events, where you might reasonably expect not every single object in an action to be present in-frame when the action is run.
D) number of objects from unused frame: 0
number of teal objects: 1