CPU usage on opening Renoise

Recently I have a weird phenomenon in Renoise. At opening the program the CPU use is at 10% and stays there even though i’m not doing anything. I can’t remember it being like this before.

Also i have this weird ticking noise when using Kontakt now… Could these two be related?

I’ve updated my soundcard and drivers but nothing seems to help. In Ableton everything works fine, so i don’t think it’s the soundcard.

Does anyone have any idea what the problem could be here? Lots of thanks in advance!