[mhdebokx]

I'm happy to look at debug logs for both these (make sure to turn the debug log on in AS as well as Kodi). I suspect this is a skin issue in both cases, but the logs would tell me for sure.

Well, here they come
In session 0 I enabled debug logging, and then restarted Kodi

In session 1: log1
- I started playing music
- By default Fanart is shown in Mimic in my case.
- I select visualization option, and select Artist Slideshow.
- Go to full screen, and the background shows correctly the AS images
- exit Kodi

In session 2: log2
- restart Kodi
- I started playing music
- Again the default Fanart is shown by Kodi/Mimic. I supposed AS should be working here
- I select visualization option. Again Fanart is selected (and not Artist Slideshow which I selected in session 1), and select Artist Slideshow. again
- Go to full screen, and the background shows correctly the AS images
- exit Kodi

I hope you can find what the problem is. If AS is selected as visualization, to which (config) file is that info written to?

Thanks for looking! Michel