Hi,
I just encountered the following rendering issue: Messages to/from diagram edges lose their dashed aspect when colored.
[-->A : hello
[-[#green]->A : hello
A-->] : hello
A-[#green]->] : hello
BTW, while [ and ] roles are fully specified (respectively left and right sides of the diagram), they cannot be used symetrically as others participants do:
A<-] : Works
]->A : Does not work
Thanks.