Freezing Xfinity Stream Live TV

Why does the xfinity streaming app freeze while on live tv?  The app doesn’t freeze during On Demand movies, only for Live TV.  I am on my last nerve.  Customers have two choices, pay outrageous equipment fees for a service that would not work without them, or use an app that doesn’t work either. By the way, when a customer pays for cable, required equipment necessary for the service to work should be included. Why pay for something you cannot use otherwise?  Streaming Apps are trying to discourage customers from using cable anymore, your extra charges are pushing people further away. Cable will be like car dealerships, soon to be obsolete.