vm-imap-server-timeout malfunctions

Setting vm-imap-server-timeout to 1 had the following effect. When an attempt was made to fetch an external message, notifications received were:

  Checking IMAP connection to server...
  IMAP message unavailable: IMAP protocol error: "No response from the IMAP server"

However, the IMAP process buffer shows:

VM NOOP
VM OK Success
VM UID FETCH 3584:3584 (RFC822.SIZE)
* 79 FETCH (UID 3584 RFC822.SIZE 29450524)
VM OK Success
VM UID FETCH 3584:3584 (BODY.PEEK[])
* 79 FETCH (UID 3584 BODY[] {29450524}
Delivered-To: <email address hidden>
...

So, the NOOP succeeded and so did the FETCH. Did the timeout occur in the middle of FETCH? That is bad news.