Problem with channel changing

Hi everyone

Actually , i”m experiencing some issue. Since i, sorry since my shield auto-update kodi, when i change channel, sounds and video are no more synchronized.
I have to click on stop steaming, and select again the channel.
I didn’t have this problem at all with kodi 16. What should i do? (i will post on kodi forum too but maybe someone has an idea here).

Hardware: Player Nvidia Shield (5.1 last update) and kodi 17.1 (now)
Server Ubuntu 14.04 LTS with 8Gb Ram Intel Q9550 DigitalDevices 4 Sat tuners
Lan Gigabit