FYI I still had a problem even with "Audio Effects" property set to "OFF" in the following sequence:
On layout 1 play a music with the basic Audio plugin
On layout 2 stop the music with basic Audio plugin
On layout 3 stop the music with AudioHelper plugin, with 1 second fade-out (even though the music has already been stopped in layout 2)
Go back to layout 1 before the end of the fade-out, the music has a problem similar to the one experienced in the capx I posted in my previous comment. This happens with the very last (updated today) version of the plug-in.
I fixed it very easily be deleting the audiohelper action on layout 3 (it was useless anyway), but wanted to warn you that such error in the events could cause audio problems.
I made a capx to show you the problem.
In the capx above, going from layout1 directly to layout3 also creates the problem. Furthermore, adding "remove all effects" from tag "music1" at the start of layout1 does not help.
In other words, if tag "music1" is currently being faded out with audio helper, and you change layout before the end of the fade out, and the new layout wants to immediately play the tag "music1", then the tag "music1" will not play anymore.