My Wi-Fi on my iphone 4s won't work on instagram?

My Wi-Fi is connecting and i can use the internet and other apps that require Wi-Fi, but when i go instagram and try to follow people it doesn't work. I follow then it says unfollow then follow in like a second. Then the Wi-Fi bar goes low to strong then low. I tried to restart it and i even redownloaded instagram, but still doesn't work?

Reboot the iphone.work now?

if not, contact Instagram on their appstore email address. Its not the phone cause everything else works…