I found my fix. It seems to be caused by the windows/software processes that I'm on such as Teamspeak, iCue, Dolby Atmos. I followed this youtube guide (https://youtu.be/Ix3VvzeqVig) and play around with it. Mic issue is also resolved.
Also, the robotic or sound distortion did occur when I start playing Rainbow Six Siege. I resolved it by turning off/on the Dolby Atmos software.
ICUE Software sometimes does act a little bit funny. This time, the "mic on, mic feedback on" sound suddenly disappeared when connected as a wired headset. I did a quick fix for this by flipping off/on voice prompt option in ICUE.