So I have the LG 4K UF display hooked up to my '16 MBP. I also have stereo speakers that are plugged into the MBP (3.5mm). Every once in awhile, the LG "takes-over" the audio and plays thru the display speakers. I go into sound pref. and reduce the volume for the LG but it resets every once in awhile. Is there anyway to perm. disable the LG speakers?