Whenever I open Battlefront 2, the internet on my modem goes offline.

I was playing the game for a few days without any problems. One day I entered the game and suddenly the internet went out, not only on my computer but also on my phone, I couldn't access the internet. I closed the game, my internet came back and I opened the game and it went back. For 3 days I have been dealing with this, every time I enter the game, my internet starts to go on and off.