It happens for every player who died and respawned, and disapeared once you reload game and reconnect. As a problem -among others- you can't select your train loco while you are in it, you have to select it ant start it before jumping in^^
I'll try to join a screenshoot when i'll be back home after work (working hard

Otherway, we had a quite long 4 players session, and excepting desync on loading map, it was stable, so good job, keep it on that way!
Edit : screenshoots, on the 2nd I can't place the belt, I just have the icon

