Audio Output Changes if Display is Put to Sleep

Hi. So in Zorin OS Lite, in Power Manager, under Display tab, I have "Put to sleep after..." set to 1 minute, and Switch off after..." set to 1 minute.
If I wait and let either of these ones happen and I wake up my pc, my audio output device switches from my HDMI monitor's speakers to my wireless headphones on line out. And I can't select HDMI output unless i restart the computer.

I don't want it to switch. I'd like to have the audio device stay the same after sleeping/turning off and waking/turning on my display. Is there a way to fix this?

This looks very similar to: