High CPU usage by Netty / OpcUa

We’re having some issues where the CPU suddenly rises to 50% or even 100% on our Ignition server.

When the OPC Server module is restarted, the CPU usage drops back to single-digit numbers, for a few hours. And then it goes back to 50%.

When showing the threads, most CPU usage seems to come from the ua-netty-event-loop and the ua-shared-pool threads.

We only have this with one project, and I really don’t know what’s different between this project and the others.