Aurora R?, front panel mic not working, rear mic works

I'm using an audio splitter with my BOSE qc25 on Alienware Aurora. When I first tried front mic and speaker jack, the computer can recognize the mic but no sound retrieved by mic and speaker works well. Then I tried rear jack, the mic and speaker both works fine. Does anyone have same issue like me?

 I also tried single mic plugged into front mic jack, it also works.