192.168.1.0/24
I disabled the proxy in sonarr and changed the IP back to the servers 192 address and that worked, reenabled the proxy and dead again. I went in to the running qbit container and had a poke around, I can ping unraids 192.x address successfully, tried curl but no joy same behaviour as the containers like it's hanging. I haven't verified that works on the older image though, can try that tomorrow if it helps.