I see. Looks like there are strong routing dependencies internally. It shouldn’t be doing this with a simple audio track. For some reason when doing this typical setup (Group into Audio Track) it does some really weird things under the hood.
Here’s a recent topic exposing some really weird issue when doing this specific routing : Mix Down to One Audio File incorrectly includes the content of unwanted audio tracks
The Audio Track’s input bus should obviously not seek for the full signal path as long as it is not monitored.
My guess is that fixing all of this would require to rewrite the audio engine from the start (which is planned but no ETA).