Started modeling this little guy, then when I want to extract half of his body Maya 2014 deletes it or makes him invisible....

Maya 2014 Extract bug ? - YouTube

Tested with Maya 2013 and no issues at all...

maya2013 extract - YouTube

How can I fix this or am I too rusty ... ? I uncheck and check Keep faces together and still the problem is there with Maya 2014. Any help is welcome. Thank you.