Hi all! I have done some research and it seems the slow bevibour is related with the slow execution of python scripts: Slow Python scripts in Krypton - #14 by BasRieter. I use many addons which list huge lists, and they takes too much time to load the content.
It is very frustrating. I think I could not stay in Krypton until kodi team fixes this issue. So I think it could takes months until it’s fixed (if someday it is…) and the OSMC team upgrades the kodi which contains the fix, right?