After few hours constant 15% CPU

Some time after restarting the app, I notice a constant 15% CPU usage while idle. Can you help me figure out what might be taking up the CPU?

<img width="318" height="502" alt="Image" src="https://github.com/user-attachments/assets/7f97e0a1-24ab-4a4d-8b98-06e2cae844bc" />