Tab completion is partially broken in buster.
When logging in it works until tab-completion is executed on a system command outside of the vbash menu.
steps to reproduce:
vyos@vyos:~$ [TAB] Possible completions: add Add an object to a service clear Clear system information clone Clone an object configure Enter configure mode connect Establish a connection copy Copy an object ....
vyos@vyos:~$ show [TAB] Possible completions: bridge Show bridging information cluster Show clustering information configuration Show available saved configurations conntrack Show conntrack entries in the conntrack table conntrack-sync ....
vyos@vyos:~$ ls [TAB] Invalid command: set +o tag [noglob invalid] Invalid command: set -o tag [noglob invalid] .bash_history .bashrc .profile .bash_logout .gnupg/ .ssh/
vyos@vyos:~$ [TAB] Possible completions: * vyos@vyos:~$
Tab completion is now broken until the user spawns a new bash process..