Logitech Z4 Speaker Sysytem problem

Has anyone had a problem trying to plug in a speaker system into the Triple Display Docking station? I have a Logitech Z4 system and it works fine when plugged directly into my Dell XPS 13 (9350). However, when I plug into the headphone jack of the dock, the music will start, but it breaks up occasionally. The laptop does recognize the “plugable audio”. I can even get a proper test (sound from each speaker). I have a support ticket started - just curious if this has happened to others. Thanks