It appears that subscriptions may have gotten out of sync between CSD and possibly Dante Controller at some point. But however it happened, I would recommend the following to fix it:
-Make sure Dante Controller is not running and then open CSD.
-Open the most current file. Select NO if you get the 'update subscriptions' message.
-Ensure that the TCC2 Dante input block shows "1" for the input channel.
-Right-click the block and chose 'update power on subscriptions'.
- Save it, send the file to the system and test.
If this continues to have the same issue, try deleting the TCC2 block and re-adding it. This will also delete the GPO and AEC ref blocks, which will need to be re-connected to where they were. Save, and push the file again.