this thread more or less answers my question : Local Seq. trouble
should put in the documentation that it does not mean every instance retains state of their local shuffle/sequential playback because that’s not what happens.
Only items selected within the same event instance are taken into account, so a new instance of an event always starts by selecting the first item in the playlist.
E.g note that it will never go to the second item in the playlist even if on the same instance