SFC Chart "Cancelling" forever

I am developing some SFCs and in the process I had some of the enclosings set to "Cancel" instead of "Block" (they default to cancel, which I would not have selected as their default). Now, I have some SFCs showing in my Chart Control panel as "Cancelling" for nearly an hour at this point. How can I force them to finish cancelling and clear out? When selected they show no highlighted components. The "Active Step" is not lit up, and the "runningTime" is stuck at 0.