vb virtual audio cable works half of the time

This setup lets me do simple processing of the microphone audio, and record it in OBS. The output device is the VB-Cable driver, which is a virtual audio channel that lets me send the resulting audio signal to OBS. I use JACK with the following settings – the input device is my XLR microphone connected via the Behringer UMC 204HD interface. My current setup and what it can and cannot do:

My audio input devices (various microphones connected to the computer).

The system audio (the monitor of audio output devices one can select on the right side of the windows toolbar, the system audio should still be audible to the user on the chosen output device).

However, I have not been able to figure out how to access the following from Ardour, simultaneously: My goal is to be able to apply all the mixing, filters and other effects within Ardour and send the resulting audio via a single stereo channel to Open Broadcaster Software (OBS). I would like to try Ardour for real-time audio processing for livestreaming.

Vb virtual audio cable works half of the time