Some workarounds include using a supported external player (e.g VLC, list of all supported players below or by pressing the ? icon in the dropdown menu next to the 'Watch now' button in the app), finding a different video/torrent that the audio will play (e.g change the quality, use the 'more..' function, or the Torrent Collection tab) or ultimately if you just prefer using the build-in player without having to deal with this issue at all use the old NW.js build of the app.