According to Busan New Port site, "MSC Oscar" did not load any containers there, although staying for approx. 24 hours. And, since Nakhodka is but a bunkering port in the schedule (is it?), I doubt that she went there with any load. Of course, since I was not there to see her in Busan (like I planned), this is pure speculation.
"Maren Maersk" is scheduled at Busan on January 19.
As for "not under command", seen it many times with vessels idling/waiting for berth etc.