In the 747, Approach Idle is active until 5 seconds after touchdown, and when thrust reversers are selected. So even if the engines are allowed to go to idle before deselecting reversers, there will be a momentary (albeit minor) surge forward as minimum idle is selected by the EEC. It can be a real problem on slippery runways, e.g., if attempting a high-speed turnoff and deselecting reverse in the turn.
Other airplanes/engines may be similar.