User connexion refresh problem

Hello, i’ve a problem on my website, when i’m connecting to my website, i don’t see if i’m online or not, to see if i’m connected, i need to refresh my page… I have the same problem with the admin bar, on the website all the page are ok except the index page, the admin bar disappear of the index and i need to refresh to see the bar reappear.

I need your help please