Dual Monitor Speaker Setup Hardware Help

Hello everyone, I've been trying to fix this for a while, but I can't seem to find a solution.

I'm trying to use my DVI connected monitor as a video port and use an HDMI connected soundbar as a speaker simultaneously. I'm trying to send video to the monitor and audio to the speaker. Currently, when I plug in the speaker, it starts to send video to it and the video on my monitor immediately cuts out or starts to show random colors.

this setup has worked in the past, it stopped working after I took out the HDMI cable and replugged it in.

I've tried using a script to auto-extend new connections on boot, as extend was the setting that worked before, however this isn't working.

Any ideas?