Keep getting internet connection Error

I bought the season pass. Even though I had the hero pass already so I paid extra for the dlcs. Now, whenever I play dlc areas, I get kicked all the way out. It says internet connection issues but, im on live party chat with my sister. And that doesn't stop. I have my son playing games on ps4 as well, with no problem. Ihave even called my internet provider and they are not showing any drops.  Please fix this