Consider the following backto back mcast mac updates.

Remote Mcast Mac

{ unknown-dst, ls0, [TEPIP1, TEPIP2] }

Remote Mcast Mac

{ unknown-dst, ls0, [TEPIP1, TEPIP2, TEPIP3] }

Remote Ucast Mac

{ 10:10:10:10:10:10, ls0, TEPIP3 }

second and third update are not processed properly and device is not having the ucast mac