This is a famous Build 37 bug. Fix: The host must have Port 16261 open, and all players must disable Steam Cloud saves for Zomboid. Also, never reverse at high speed.
Check out our guide: "How to Run Build 41 on a Chromebook using Linux." project zomboid build 37 download updated
While the "latest" version is much newer, you can still download This is a famous Build 37 bug
The development team behind Project Zomboid has been working tirelessly to bring you the most immersive and challenging gameplay experience. Build 37 is a massive update that includes: project zomboid build 37 download updated