Stop Discord from lowering the app volume
The Attenuation feature can be very handy because it automatically drops the volume of other applications so that you can have clarity in the application you are using at the time. Thinking of it in the context of the problem at hand, if the Attenuation feature on Discord is enabled and working at a high rate, then it might reduce the app volume at times. Here is what you can do about it:
Press Esc or exit this menu to save the changes, and thereon, you shouldn’t face Discord lowering the app volume on its whim.
Fix Attenutation not turning off on Discord
The only problem you might face here is Discord Attenuation not turning down, in which case you can try one of the two fixes discussed below.
1] Turn off exclusive control from Sound settings
If the exclusive control option is enabled on your PC, then any app currently using the sound utilities possesses a high control over them and can lead to some sound configurations not working.
Click on Apply and then Ok to save these changes, after which you should go back to the Discord app to check if Attenuation is configurable again or not. Read: Discord Stream Stuck on loading or Not loading
2] Disable Windows Communications Activity
The Windows Communications Activity utility administers sound communication on your PC. It is responsible for detecting communication via an application and taking further action accordingly. Disabling it is one of the most common fixes for sound errors on Windows.
Any issues you were facing with Discord Attenuation should now be fixed.