3.0.1 No longer sets closeCode on sink.close

[hagen00]

In version 3.0.1 closeCode is no longer set. I have reproduced as follows:

Code to reproduce

// in button onPressed:
await channel?.sink.close(status.normalClosure); 

// in onDone callback
print('Close Code: ${channel?.closeCode}');

Results:
Using version 2.4.5 the closeCode prints correctly.
Using version 3.0.1, the closeCode is null