Frame-by-frame co-op (Dying Light 2: Stay Human)

Good afternoon, please give me a solution.
Playing on the PC version of EPIC
After past 1.06, with a joint passage of 2 players, the one who connects to the game terribly starts to lag and work frame by frame, taking into account that the Internet is normal, including in other games and the performance of the game is normal over 90 fps.
Please let me know how to fix or get around this issue. The second region, where skyscrapers and issued a steam plane.