[Kodi 17 Krypton] UDP streams / IPTV Simple PVR Client

Hello,

I have glitches with audio and video on Krypton + IPTV Simple Client for UDP streams and takes ages to start or switch channel – buffering.
No issues with my connection, same streams work fine on Windows with VLC and MulticastTV, and on Android TV with SPMC, but not with Kodi since… not sure when. It worked on Jarvis some time ago I think, just not on latest releases.

Screenshot from Windows (its same on Android):

Android debug log
Windows 10 debug log

Can someone help me fix this, please.