UNPLAYABLE !! Massive latency spikes on endgame maps

As of today, I'm unable to play the endgame.
As soon as i load a map without a party, latency spikes, and eventually I'm thrown out of the game!!
I've lost 2 maps now due to this - not because I die, but because the latency throws me out of the game.

My own internet connection is stable throughout this experience and holds a steady 1000/1000 connection.

I've attempted a ton of fixes, multiple gateways within the game, disable triple buffering and so on. Non of this makes a difference.

While in my hideout, i have no issues. As soon as i load in to the map, the latency instantly climbs, I'm frozen in place, and then thrown out.

Please tell me how to fix this.

Note this is for POE 2.

I seem to be having same issue.
Have been testing my internet continuesly through these spikes, and connection is rock solid.
It started yesterday, and is still present today.
In cities, campaign areas i have lag spikes that last for up to 1 min before i see the server catch up, with a fast replay of how all the mobs in the area killed me.
It really is unplayable.

POE 2

Same issue here. Lag makes even T1 maps unplayable for PoE 2