Config List updates are sent by the same mechanism that sends Agent Upgrades. If an endpoint has a pending Agent Upgrade, it will stop getting CL Upgrades until the Agent Upgrade completes.
The pending Agent Upgrade will need to be cancelled for the updated Conflig List to be sent to the Agent. This can be done either individually, Agent by Agent, or it can be done globally, for all Agents.
Individual Agent:
Globally (All Agents):
Additional troubleshooting may be necessary prior to enabling Agent Upgrades if the Config List still is not being sent to the Agents.