This problem has been happening to me ever since I switched internet providers to AT&T. Any time I play a video game like Fortnite, PubG, and any other game that needs lots of internet my internet speeds will drop very low like my upload speed with drop from 900 to like 0.22 while playing Fortnite. Also if I open google I will start to lag in game and have to close it out. This problem is pretty annoying because I want to be able to stream some games but since to speeds are so low I cant get any good bitrate. If anyone knows how to fix this problem please let me know.