audio stutters when playing through library

Hello,

Have a weird issue since kodi 16.1/libreelec 7.0.0-002.
Audio files, mostly flac played in library is stuttering, however same files played direct from folder do not stutter.
HD audio in movies/series do not stuter.
Changing the audio settings from default to any other does not change this behavior, better or worse.
My setup is a asrock beebox n3150 connected to a yamaha rx-671 receiver (HDMI).
I do not notice that signal is broken or stuttering at receiver level.
Any cliues?

Kind regards

Quote from DaVu

could you please enable debug logging in your system settings, then reboot the machine and after that trying to play a flac which stutters and one which doesn´t. After the playback of both files please provide a debuglog:

index.php?title=HOW_TOrovide_Logfile

Hello,

Debug.zip is attached.
I've played zero 7 - i have seen.
First direct, second with library.
At least one stutter with library.
Thanks.