Sure
Match ID for the game where it happened to both me and my friend: 29044066
I was playing Grey Talon and my friend was playing Wraith.
Note: My friend reported on discord that he had lost sound way earlier in the game than I did, around 15 mintutes in~ shortly after laning stage ended. Mine suddenly started disappearing later in the game around 35~ minutes in.
The following match our teammate that neither me or my friend knew, also reported having the same issue, where he suddenly couldn't hear ultimates later in the game and that he had to reboot his whole game to try and fix it (unclear if it did, since he just kept complaining that his game was broken)
Match ID:29048286
The player affected in this case was the Pocket. Both me and my friend, playing Grey talon and Abrams respectively, were completely fine in this game.
From checking the replay, the player started complaining about the issue around 18-19~ minutes in, saying he could no longer hear any ultimates in the game.
If I catch it live I will try copy paste the dev console as you say.