Comware 7 (HPE59xx) switches running MPLS & LDP are listening to the LDP port (tcp/646) on all interfaces; can't shut it off or filter it with ACLs... what's the deal?

The ACL counter on the ingress interface increments but I can still connect to the port anyway. I wasn't able to catch it with COPP either... anyone know the trick? Is it a bug? Am I stupid? (Yes.)