Entering new area when partying moves you to your own instance alone

Heya all. So i played with 2 of my friends today several hours and after playing some time every time i went to new zone i was in my own instance and not my party members instance. I had to portal to my friend so i could join same instance they were in.
Anyone else with this problem and is it known? I Tried to leave party and log out/log in and nothing worked.

Edit: I also disconnected couple times when entering new zone and it also made my other friend disconnect at same time. I dont remember zone name anymore but i can check it later if needed.
Edit2: here’s the player.log too
Player.zip (169.4 KB)