To reproduce:
- Open attached project and launch scene "test2"
- Open Audio Mixer > Crickets (Mixer)
- Select "crickets" audio group
- Add a Send to the audio group
- Observe in Inspector that the Bus is not connected
- Click on "Add..." on "crickets" audio group and select "Send"
- Right-click on the Send and connect it to "FX" audio group
- Observe that the audio groups are now connected, but in Inspector it shows as if it was not connected
- Click on Send again on the audio group
- Observe that Inspector is now updated with the correct Send information

Please see also attached video for repro steps.