Plex killing bandwidth



Hello all,
I recently bought an Nvidia Shield to use as a plex server, however the issue im having is when i have plex and plex server running on the shield, it absolutely destroys my wifi bandwidth. For whatever reason, my PC bandwidth is still fine, but my wifi on all devices just goes to a stand still.
Thats even without a library attached to the plex server at all, just running, not streaming anything.
My set up is my router (asus RT-AC66u) -> powerline adapter -> powerline receiver -> shield.
I know the issue is plex itself because if i stop the app from running i get normal operation on all my wireless devices. How can i trouble shoot this?


I wrote garbage please delete this.