node inspect restart prints Debugging/For-help message twice

[Trott]

• Version: 16.x.x
• Platform: macOS
• Subsystem: debugger

What steps will reproduce the bug?

$ node inspect test/fixtures/debugger/three-lines.js 
< Debugger listening on ws://127.0.0.1:9229/b7e232ed-227e-4482-864d-e58a37e4bc94
< 
< For help, see: https://nodejs.org/en/docs/inspector
< 
< Debugger attached.
< 
 ok
Break on start in test/fixtures/debugger/three-lines.js:1
> 1 let x = 1;
  2 x = x + 1;
  3 module.exports = x;
debug> restart
< Debugger listening on ws://127.0.0.1:9229/b7e232ed-227e-4482-864d-e58a37e4bc94
< For help, see: https://nodejs.org/en/docs/inspector
< 
< Debugger listening on ws://127.0.0.1:9229/d0c753b1-e93a-48e5-8323-df845d308bcd
< For help, see: https://nodejs.org/en/docs/inspector
< 
connecting to 127.0.0.1:9229 ... ok
< Debugger attached.
< 
Break on start in test/fixtures/debugger/three-lines.js:1
> 1 let x = 1;
  2 x = x + 1;
  3 module.exports = x;
debug> 

How often does it reproduce? Is there a required condition?

Every time.

What is the expected behavior?

After issuing restart in the debugger CLI, it will only print "Debugger listening on...For help..." message once.

What do you see instead?

It repeats the initial message from the start of the session, then issues the correct second message.

Additional information