Your comments

actually seems like more often its the A input of the Multiply Matrix node >_<

I just put together a shader with the Multiply Matrix node and came across this same bug. Close the shader, re-open and the A input of the Append node is disconnected!

thanks Joachim that would be awesome!

also just bought Shader Forge hoping to use it with 5.5 beta. Is there an ETA for that quick fix?