Only because a user installed their system, doesn't mean they completely understand it. It's a continuous learning process, and we should support everyone who's willing to learn.
@rino19ny:
In this case, it seems like you're actually using NetworkManager, plasma-nm is a frontend for it. However, it is possible that you have a second network manager or static configuration configured, so network manager backs out. You can check that by typing nmcli in the terminal, it should show you the status of network manager on your system. If it shows connected, then the display applet in your Toolbar is the issue. If it shows disconnected, then you should check what other network manager you have installed, and uninstall it.