Compressor is outputting 5.1 surround AAC tracks with no sound.

I have been creating a HEVC video file with a surround sound 5.1 track. I am assigning mono wave files and then adding the video master. I'm outputting with a modified HEVC file (the video resolution is an odd format). Back in August this worked multiple times.

Now with the same files and the same preset, compressor is outputting a file that shows video, and shows the presence of 5.1 audio tracks. But all tracks have zero sound information on them.

I trashed compressor and the entire compressor folder in the library and reinstalled. Same issue.

I tried a new render with a different video and different sound files. Same issue.

Is anyone else experiencing this with the current version of compressor?

Is it possible to go back one version?