nexus5oof

Hello there, as having my old cellphone Nexus5, and wanted a new updated Android system, I am really happy to use version 16 of LineageOS on it. Almost everything is okay, except the following: 1- They system is moving a little bit slower than before, but that's normal because the hardware on the device are poor. 2- Usually I got some icons disappeared, especially icons on the lower of the screen. 3- This is my major issue, I have some apps which cannot connect to Internet, when I open one of them, it says (No connection, check your Internet first) Thank you so much for the wonderful work. And I have a question about the updating, will we get an update through the system itself, or will we have to flash the new updates? Regards!