First action does no call to backing bean

[Strittmatter, Stephan]

Hello,

I use MyFaces 1.1.5-snapshot for current development of my application.
Now I found a problem, that always the first action within a session
called through a commandButton is not passed to the associated backing
bean. 

I have no idea where to search for this problem. Has anybody any hint?

Thanks in advance,

Stephan