after the latest update there seems to be an issue with my sound. Im using an usb-audio interface which has worked properly before the update. So in the sound settings all the devices seem to show up but as soon as i want to play back with an application like lollypop, rhythmbox, spotify or anything else i got no sound. Additionally the sound devices list view crashes. After opening again the sound settings the list is cleared, no devices show up. After a while they get loaded again. Testing the speakers within the settings works fine, when devices are listed but i cant play any audio via external applications, because it crashes again.
You mentioned a change in sound widget..could there be a connection?