No Audio with routing in Server 2.4

I’ve tested the newest CasparCG Server 2.4 Build and give it a try. I’ve noticed, that there is no Audio when i’m routing a Channel (or Layer) to another Channel. I’m using the command “PLAY 2-10 route://1-10” or “PLAY 2-10 route://1”. On 1-10 there is Audio but on 2-10 there is nothing. I search the Forum and the Internet, but i did not find any infos about this topic. Is Server 2.4 broken or is it a new feature? How i get Audio to the other Channels?