TTY problem when running ubuntu:zesty image

General
1

When using docker run -t the terminal is not recognized as TTY by Ubuntu Zesty:

[rojer@nbmbp ~ master]$ docker run -it --rm ubuntu:xenial tty
/dev/console
[rojer@nbmbp ~ master]$ docker run -it --rm ubuntu:yakkety tty
/dev/console
[rojer@nbmbp ~ master]$ docker run -it --rm ubuntu:zesty tty
not a tty

version is:

[rojer@nbmbp ~ master]$ docker version
Client:
 Version:      17.05.0-ce
 API version:  1.29
 Go version:   go1.7.5
 Git commit:   89658be
 Built:        Thu May  4 22:10:54 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.05.0-ce
 API version:  1.29 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   89658be
 Built:        Thu May  4 22:10:54 2017
 OS/Arch:      linux/amd64
 Experimental: false