During an extended Multiplayer session, a Client moving far from the host may fall under the map textures. This can cause the character to get stuck in geometry, die from a fall damage, or fall out of world.

Workaround: 
- Call/Whistle for your buggy using the Buggy Radial

Bugs: 
P20-18111 - Clients buggies become invisible and cannot be interacted with after host loads their save data

P20-19642 - Buggy can be invisible when the player dies