No audio with video rendering

Hi
Common problem. I cant render a video with audio. Using 2.83. Same problem in 2.82. Usually it is because audio is not included in the output preferences, ffmpeg isnt engaged or sequencer is checked under post processing. I know this works because I had it working before. Its just a test animation with a simple mp3 audio file that plays fine in the editor. Here is the setup. Reimporting the video shows no sound included, like you can see on channel 4. Any help appreciated.