Why Are My System Sounds So Quiet on My TEAC AI-303 via Bluetooth?

Hey everyone, I'm setting up a desktop HiFi system and currently testing out the TEAC AI-303 DAC/AMP with my setup. I'm using a Dell XPS 13 9310 running Windows 11 (which is all up to date). I successfully connected the TEAC AI-303 via Bluetooth, and while I can play music from Tidal and YouTube through my passive speakers and headphones connected to it, I'm having a big issue with system sounds. I don't hear any system sounds when I hit the 'test' button in the audio settings, even though the TEAC is set as my default device. I did install the TEAC USB drivers just in case, even though I'm connecting via Bluetooth. I haven't updated the firmware yet but plan to do that later. While writing this, I found that I do get some system sounds when music is playing, but they're extremely quiet. What's going on with this?