Same issue!

We've noticed this as well, happening mainly during games, at any time.
We never had this issue before the last patch.

My friends and I are experiencing constant, random disconnects during multiplayer. Its also freezing all clients sometime after reconnect. No apparent cause. And sometimes we can go dozens of turns, others a single turn . 

see also https://www.games2gether.com/amplitude-studios/humankind/forums/215-bug-reports/threads/43258-prio-1-multiplayer-desyncs-and-internet-connection-lost?page=1#post-329705

I've also been getting this. The game just seems to constantly desyncronise and say 'internet connection lost'. This is not the case as neither computers we play on show any internet loss, other websites and things we are doing remain uninterrupted. It only happens while playing Humankind. I see lots of people on reddit and other forums complaining about this, so it is obviously a Humankind issue. It's an absolute nightmare and so many hours wasted.

03/29/2025 We still have this issue. We run state of the art PCs with I9s 4090 128gigs of ram. Would could the issue be? We are on turn 216 playing on LAN. Going to give this game a negative rating on steam because we CAN NOT PLAY THE GAME!!! I have restarted, switched from wired to wireless internet, rebuilt the game files, hosted in on both computers, loged into the game single player saved it, restarted both computers, restarted the router, restarted the modem, restarted the game over and over again, tried next day. Next day it worked for a couple of hours then suddenly stopped working. MANY HOURS WASED IT HAS BEEN YEARS!!!!! I am going to have to go play the crap game that is CIV 7.