Yes this is a common problem. Luckily, there is an easy fix.Originally Posted by 200thhorse
You need to go to your router's configuration (consult your manual for more information). You need to find your router's QoS settings. QoS is "Quality of Service", and determines how the priority is distributed between devices. You will need to change this to ON if it is off at the moment, or OFF if it is on at the moment.
Give me rep if this works for you