Who I have the same questioned this topic

So we have Smart Family and I mostly use it to monitor/limit night/school usage for my 12 year old daughter.  She has an Instagram that is highly monitored by her mom and me.  She has no other social media (that we know of).  That said, when on WiFi with the Smart Family VPN, Instagram is very slow to respond (pictures won't load, slowly load, glitchy).  If we shut off WiFi and go to Cellular data, it works fine.  I figure it has to be something with the Router (provided by Verizon)???

Help.