[Klojum]

- Carefully configured skin not available anymore, have to set it up all over again

If the skin's developer hasn't kept up with Kodi development, then a skin may not be fully compatible (whatever that skin was)

- Several tv shows not recognized anymore (no episodes available)

Unable to comment without details/specifics. Using Samba connected storage?

- DVD menus can't be used in iso files (no response to any buttons), so basically useless

See here for test images: https://forum.kodi.tv/showthread.php?tid...pid2817051

- playback of any video takes 5 seconds after pressing play

Unable to comment without details/specifics from a debug log (wiki) file.

- Had to configure add-ons again

Which add-ons?

- Random freezes, have to restart constantly

Again, no details/specifics from a debug log (wiki) file available.

Very unhappy with this...

Agreed, but some things seem to happen very randomly. Kodi 18 on my 2015 Shield TV has worked okay so far. It has a couple of simple add-ons and is connected to network storage via NFS. No freezes so far.