I finished my (100% bug-free) first playthrough and started a second playthrough with a different character on Hardcore mode.
Everything was fine until I got to Odo - during the conversation the voices cut out, leaving just the music playing. The conversation proceeded as per usual apart from the sound - I could still select dialogue options and finish the conversation.
Out of conversation sound effects also weren't working, only the music.
I saved the game at the point nearby and then loaded and the issue went away, so not a game-breaker in any sense, but I thought it would be worth reporting.
Apologies if this issue has already been mentioned before, but I did a quick search and couldn't see any topics that looked relevant.