While checking a url for page speed insight i am getting low score. The reason appears simple. The page speed insight is checking the page after logging in to the word-press dashboard.
The result mobile page screenshot shows wordpress admin bar on top.
I am using wordpress+Google Sitekit+Lightspeed Cache
Have cleared all transients
Still no go.
It shows the admin bar because you are logged in.
If you wish to force hide it, just include some custom code in your functions PHP to hide it when user X is logged in. This can be achieved with simple CSS.