Notification sounds aren't played any more
At some point on one of the recent nightlies, the notification sounds for "alert on next mark" stopped playing. I have sounds enabled for iTerm2 in the system notification settings. The alert pops up, but only a visual flash appears, no sound (I have "flash the screen for alert sounds" enabled in the system accessibility settings).
I am using Build 3.3.20190429-nightly and macOS Sierra 20.12.6.
This is also somewhat related to #6719.