Before revision:  Crucially, we find a novel dynamical regime characterized by an intermittent current and subject to severe finite-size effects that can enhance the transport at high particle densities. We describe and rationalize the variety of regimes via refined mean-field approaches .
After revision:  Crucially, we find a novel dynamical regime characterized by an intermittent current and subject to severe finite-size effects . Our results demonstrate the impact of the regulatory role of the dynamical defects in transport, not only in biology but also in more general contexts .