30% CPU load on idle

[MasterJulian]

I have not used my Pyra in a long time but I wanted to check out the current state of the software. I updated the system with "sudo apt update && sudo apt upgrade" but now I have a constant CPU load of 25-30% on idle on both cores. The red activity led is flickering constantly.
I attached a htop screenshot. Anyone got any ideas what that might be?

 

[levi]

You probably need to hit K (shift+k) on that htop screen to show the kernel threads because the user processes alone don't add up to that much.

 

[mrpalmtop]

If you haven't used the device in a while, it might have had to catch up on a bunch of crond tasks