I have the same thing in Ubuntu 18, except it doesn't say "disconnecting", it says "disconnected".
I have to reboot the computer every time I want to reconnect to the VPN.
@andrew.hughes Is the Pulse client UI status stuck at "Disconnected" even after providing valid credentials during the login?
On Ubuntu 20.04, you have to manually kill the job /usr/local/pulse/pulsesvc after restarting the Pulse UI. Then it works to open a new connection.