All audio channels can be heard by remote participants

We have connected our Zoom client to our professional audio system, where we feed multiple channels of audio (8 channels). However, the remote participants can hear all channels of audio "downmixed" into the Left and Right audio channels in Zoom, including alternate language translations, LTC time code, etc. We have Original Audio turned on, as well as Hi Fidelity, and Stereo audio mode. How do we get zoom to only pass the stereo L/R channels into the meeting and not downmix all of the other channels as well?