[Guilouz]

Quick and dirty (no time to proper check):
The option: enable music theme… toggled on makes streaming plugins crash Kodi when a list of movies is requested (list shows, screen flickers several times, Kodi crash). When disabled it works oke.
Tested several times with Netflix addon.
Any idea?
When not I will supply logs.

Thanks

Try last git 2.9.9, it's fixed.  

Still not working (crashlog to large for ix.io).
Snipped:
16:45:07.357 T:139766804882560   DEBUG: CPlayerCoreFactory::GetPlayers: added 2 players
16:45:07.359 T:139766644139776   ERROR: Init: Error opening file plugin://plugin.video.netflix/theme.mp3
16:45:07.359 T:139766644139776   ERROR: CAudioDecoder: Unable to Init Codec while loading file plugin://plugin.video.netflix/theme.mp3
16:45:07.359 T:139766644139776 WARNING: PAPlayer::QueueNextFileEx - Failed to create the decoder
16:45:07.359 T:139766644139776   DEBUG: OnPlayBackStarted: CApplication::OnPlayBackStarted 

Try to replace line 3 in 'Custom_1143_ThemeStartSoundtrack.xml' file by this : 

Code:

<onload condition="String.IsEmpty(Window(home).Property(PlayingOST)) + !String.Contains(ListItem.Path,http) + !String.StartsWith(ListItem.Path,plugin://plugin.video)">PlayMedia($ESCINFO[ListItem.Path,,theme.mp3])</onload>

And tell me if it's working.