Generally we suppose that if there is any time lapse between event A and a subsequent event B, A cannot be the cause of B. But what if time were continuous, such that between any times t1 and t2, we might specify a distinct time t3? In that case, there would always be some time lapse between any two events: would that make causation as described impossible? Does conceiving of time as quantized solve the problem?
But we don't "generally" suppose that earlier events can't cause later events! Jack's earlier smoking caused his cancer, the earthquake ten minutes ago caused the tsunami now rolling across the ocean, my flick of the switch caused the light to come on a fraction of a second later, and so it goes. If anything, the "general" view is that causes precede their effects. It is not for nothing that, for example, David Hume's first attempt at a definition of a cause is as "an object, followed by another, and where all objects similar to the first are followed by objects similar to the second".