Teoz: "& note over a, b" does not work (vs "& note over a" - does work)

Hello, 
as always thanks for creating this awesome tool.
Here is a small issue I found:

Sequence diagrams, using teoz and notes:

1. note over as normal, works! 
   • Ex: "note over controller"
   • also works spanning two or more participants
2. & notation for note over also works, spanning one participant. 
   • Ex: "& note over controller"
3. & notation for note spanning two or more participants does not work: 
   • Ex: "& note over controller, urlGen" - yields error

Example for #2, works: here

Example for #3, does not work: here

BR! /marcus