im using the latest stable version 6.8.2 and this has been an issue with any docker container that has webui link
if there is a way to fix this it would be nice as having a diff ip for each docker container is nice and a simple url link getting removed is just annoying but its not a huge deal to get around
i know this is late but im also having the same issue and its somthing todo with the custom network setting if i use bridge\host it works fine but the webui link gets removed with custom (br0) this seems like a bug that unraid needs to fix