CPU constantly at 18-25% with no vault opened (Win11)

I’ve noticed that Obsidian was constantly at 25% CPU usage, I searched the Forum and found similar reports that might be explained by indexing, large number of notes, graphs, etc.

I closed and move the folder of the only vault I have and by just opening the app the Task Manager shows CPU usage that ranges from 17-18% to 25-30%.
Image attached

I assume that I can exclude any ongoing indexing situation or plugin’s performance because no vault is open, unless I am missing something.

Any clue?