[pkscout]

Hiya @pkscout such dedication looking at this over the holidays. Kudos to you.

I run libreelec 9.2 on an Intel NUC, pretty much standard with Aeon Nox: Silvo Skin. I have been following this after things went a bit sideways at the initial update of AS to 3.0.0 and Silvo needed to update his skin to cater for it. Initially I did not notice or could reproduce the high CPU, but as a precaution given some comments from other users that it appeared later, when I saw the 3.0.1~beta2 update, I copied that new default.py into my .kodi/addons/script.artistslideshow , and all seemed to remain OK.

Today I decided to try 3.0.1beta5, a complete update due to the new options mentioned, and noticed the high CPU straight away. This seemed odd to have introduced the problem, so I reverted. Uninstalled AS along with its options and re-installed AS 3.0.0 from the Kodi repository.

This observation might help from my fresh 3.0.0 install:
upon reboot, 100% CPU on one thread
once I start playing music with artist slideshow, CPU reduced to normal
after stopping music playback, CPU stayed normal
could not find anything unusual or indicating any issues in debug logs
repeated my copy in of default.py from 3.0.1~beta2 , CPU issue went away at reboot.

Hope this info helps. For the moment I'm leaving at beta2 which seems fine. I can re-try beta5 or anything else you think after some more feedback from others, and holidays

All the best.

I found the problem causing that. New beta coming.