Hello @ChuckPa, thank you for your response and your interest in my problem! 
I don’t know what “Dust Bunnies” problems are 
I can also monitor my temperatures with a service called Beszel.
I can see all the temperatures of each processor core, isn’t that sufficient?
Regarding the machine, it’s an HP ProDesk 400 G4 that I got about a year ago, which I cleaned and changed the processor’s thermal paste, as well as installing “new” (second-hand) RAM.
I’ll try cleaning them again as you mentioned.
I will also update my kernel to 6.8.
Thank you so much for considering my problem
Edit : On one of your previous posts dating back to 2020 → forums.plex.tv you mentioned adding an argument to the Preferences.xml file. Do you think that could solve my problem?
Edit 2 : I made a mistake, I upgraded to kernel 6.12, is that bad? 
