Multiplayer issues

Hi, i’ve been trying to play this in coop mode with some friends and we have some issues. It keeps disconnecting mid games every few minutes. We can’t complete 1 level without this problem. I’ve seen this is an issue since a few years, is there a patch or some fix planned to solve this situation? i bought this game to play in multiplayer mod, i wanted to play in coop so bad since years ago, it saddens me to not be capable of doing so…
What can we do to solve this issue?