Plug Slug and Critter Sensor

It looks like the sensor flickers, briefly, as the slugs transition from their sleeping pseudo-building form to waking-normal-critter form, or vice versa. While they're transitioning, the sensor seems to act as if the slug isn't there. You can work around this with a buffer gate (for "above X amount") or filter gate (for "below X amount"), but ideally it wouldn't be necessary.