A bug in icc 13.0

Hello! I got a problem when I run  the follow program:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main()
{
        #pragma offload target(mic:0)
        {
                char Host[32];
                int len;
                gethostname(Host,32);
                printf("%s\n",Host);
        }
        #pragma offload target(mic:1)
        {
                char Host[32];
                int len;
                gethostname(Host,32);
                printf("%s\n",Host);
        }

        #pragma offload target(mic:2)
        {
                char Host[32];
                int len;
                gethostname(Host,32);
                printf("%s\n",Host);
        }
        return 0;

}

I run it on a node with three MIC card.I compiled it with icc 13.0 ,then the result is as follow:

cn0-mic0

cn0-mic1

cn0-mic1

Then I compiled it with icc 14.0,the result is as follow:

cn0-mic0

cn0-mic1

cn0-mic2

Of course ,the result of icc14.0 is correct.Why icc 13.0 can not offload code to mic:2???

I am urgent，Please help me,Thank you!