private static int checkCounter = 0;

private static long lastCancelTime = -1;
private static Material lastCancelledMaterial;

@SuppressWarnings("unused")
@EventHandler
public void onBlockPhysics(BlockPhysicsEvent event) {

    if (System.currentTimeMillis() < lastCancelTime && lastCancelledMaterial == event.getChangedType()) {
        event.setCancelled(true);

    } else {
        checkCounter++;

        if (checkCounter >= 500) {
            checkCounter = 0;

            int stackTraceLength = Thread.currentThread().getStackTrace().length;

            if (stackTraceLength > 400) {
                lastCancelTime = System.currentTimeMillis() + 3;
                lastCancelledMaterial = event.getChangedType();

                event.setCancelled(true);
            }
        }
    }
}