Not. At least that is one way of understanding quantum physics – to mean that space-time is not continuous but discrete on the Plank scale. At the very least, as @T_aquaticus says about unobservable causes, this is another of those things where cannot distinguish the two. It is at least effectively discrete. Continuity is a feature of mathematical spaces, and we have long been challenging a lot of the presumptions that such mathematical constructs describe reality itself.