This is present on the latest 2020.28110 Mac build but I also ran into it on my windows machine which runs 2020.20625.
If an audiofileout chop doesnt have a viewer visible, it will simply not record anything.
Created a toe file as an example. There are two base comps with an audiofileout in each of them. Hitting the record button should start recording on both, but only the one displaying the viewer actually records. If you enter the comp labeled This_Wont_Record, it will begin recording once the viewer is visible.
audiofileoutbug.6.toe (10.5 KB)