One sound gets quieter when other is played?

I have 2 audio sources that are equal distance from a listener. One plays the BG music on a loop and the other plays sound effects. Whenever I play a sound effect, the BG music quiets down until the sound effect is played. Is there some way to prevent this?

In case other ppl run into this problem in the future I’ll link to a possible fix I wrote in another post to avoid duplication: