Consistent packet loss after not playing for a while

I've not played this act, and when I played again i have a consistent wave of packet loss (as in the image). I have no idea how to fix this. It randomly starts, then fades. On top of this issue I also have consistent lag spikes (IMAGE 2). I've not found a fix for this and have tried many different options aswell as making a ticket (only for the lag spike issue, not packet loss)