Delays in noticing network dropouts

Execution/Dev environment on the Mac is:
C#, Mac (10.15.6), CBL 2.7.1, Latest stable Visual Studio.

It does seem very consistent. Our QA guy raised it on his mac (mac mini 10.15.6).
I confirmed this on my mac (MBP 10.15.6) earlier this week. Overnight my mac updated to 10.15.7,
so I retested and its still happening.

It does not occur on our iOS app which reacts very quickly to airplane mode. Apologies, didn’t mean to list that.

Cheers.
Paul