Expect stuck after issuing exit command from application

Normally when in interactive mode, when I type in exit, it displays Disconnected from Virtual Machine 'pick0:LINUX' and then returns to the bash shell prompt.

With my expect script, it is stuck on Disconnected from Virtual Machine 'pick0:LINUX' after issuing the exit command. Here's my expect script:

#!/usr/bin/expect -f
set timeout -1
spawn /usr/bin/d3 -0

expect "Options: F)ile only, A)BS only, X) eXecute. Q)uit = "
send -- "f"

expect "Are you sure that the restore media has been verified? Confirm (y/n)"
send -- "y"

expect "All data on disk will be erased. Confirm (y/n)"
send -- "y"

expect "Enter a unit number from the above list: "
send -- "1\r"

expect "Do you wish to disable file reallocation (y/<n>)?  "
send -- "n\r"

expect "Load volume #1 and press <Enter>"
send -- "\r"

expect "Restore from incremental save tape (y/n)?"
send -- "n\r"

expect "Restore from transaction log tape (y/n)"
send -- "n\r"

expect "Enter your user id: "
send -- "dm\r"

expect "master dictionary: "
send -- "dm\r"
send -- "exit\r"

expect eof