I have migrated Kodi on RPI3 from Version 9 to 11.0.3. Nearly all works fine. Only the HDMI CEC initialization (to Samsung Smart TV) needs much longer time than before.
On Version 9, it needs about 5 seconds. Now, it takes about 60 seconds, until the initialzation is complete and Kodi can be operated from the Samsung Remote Control .
I have tested the HDMI Connection to all 4 TV inputs and also going back to Version 11.0.1, but the problem is always the same.