I sometimes can't hear sound—this applies to videos on all sites and sound files like mp3s. I've checked that the speaker icon in the address bar is on, the volume on the computer is up, and for videos the volume on the video is turned up.
My only enabled extension is 1Password, and I have the same problem in compatibility mode. When I create a new profile, the sound works on the same pages on which it doesn't work in my main profile.
After a restart of Orion, the sound works again for a time. In at least one instance, it stopped working when I switched away from a tab with a video playing.
I expect the sound to work.
0.99.131.0.2-beta
Sequoia (15)