For anyone not able to start their container after the latest updated. I added --cap-add="CHOWN" --cap-add="SETGID" --cap-add="SETUID" to the extra params list. I ended up removing CHOWN as it didn't appear to actually be needed.
The shim interface miss-configuration comment looks to be in the right direction. When I disable "Host access to custom networks" in the docker settings this issue stops for me. Running 6.10.0 rc8