SteamOS 3.7.18 Beta "Old Enough to Vote" was released by Valve today, bringing in a few more fixes for some annoying sounding issues. In case you live under a rock we're also getting some new SteamOS systems with the Steam Frame and Steam Machine you should go and read up on.

As it's a Beta you'll need to change your system updates channel to test it, or just wait for Valve to roll it out for the next stable SteamOS Linux release. You can change it via Settings > System > System Update Channel. The most recent stable update is SteamOS 3.7.17 from early November.