Active Listeners and CPU impact

Hello,

In the Developer Tools under the EVENTS tab, there’s a list of active listeners. One of the entries includes *(1 listeners), which I believe indicates a service actively listening and processing all events.

Simultaneously, my Raspberry Pi 4’s CPU usage does not fall below 10%. Could this be related to the active listener?

Any thoughts how can I determine which service requires listening to all events? I’ve noticed in some screenshots that this type of listener was absent so I assume it is not something Home Assistent needs to run and rather related to my configuration.

I’ve reviewed the last triggered times for automations and scripts, and found none that are running constantly. The only service that comes to mind is InfluxDB, which currently does not have an event whitelist or blacklist configured. Or NodeRed?