I was wondering why a bunch of my dockers were failing. Any of them that used BR0, bridge 0 have stopped working. There's no option that I could find in Settings-Networking or Settings - Docker to enable the bridge mode again to allow a Docker to have it's own "host" IP again.
I tried to change the networking to Bridge 0 and there's no option so therefore I have to revert for now. (Really nice interface though)
I also had to toggle the settings off and on to revert back to the old bridge settings.