Hi @Robert_Read,
I have split your post into it’s own thread since the previous one may be unrelated.
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
By “crashing”, do you mean to say that the music stops or that RoonServer exits by itself?