Sound bug

My in-game sound keeps cutting out after about 5 minutes of play, it didn’t do this until recently, did I do something wrong/ is there a fix?

Try validating your Rust files in Steam. If that doesn’t work, re-install the game. Those are your first options that you should try out.

Tutorial on how to validate your Steam game files https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335