I am using Ubuntu 18.04 LTS. When I first dabbled in Fopnu during the days of Ubuntu 17.10 I found that fopnu fails to restart after it is closed and continues to run in the background. It's running in the background is evident from the fact that I get the notification of it's active state in the shutdown screen. From the early days of Fopnu I have upgraded my fopnu quite a few times but still face the same problem everytime I try to start a new session after closing the previous one. A restart however kills the running process. Any solution ??