How many devices are communicating over the ether channel? Also please check your syslogs for error messages when the issue occurs.

Is all traffic blocked for VLAN Voice and VLAN Camera or is ‘some‘ VLAN Voice/Camera able to transmit over the etherport? is port security configured for any of the interfaces?

Hello,Are you able to add static MAC entry for the interface?https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_4_0_1a/CLIConfigurati…

Question: Are all port channels encapsulated dot 1 q? Also re-verify that all of your configured VLAN’s still exist.

Try show spanning-tree mst [interface-id] in priveledge EXEC mode. Show running-config can also help.