Multiplayer clients fail to connect in large maps

[vrad-exe]

Describe the bug

Trying to run large maps in multiplayer causes players (including the listen server host!) to disconnect on join. The following appears in the console:

Host_Error: CL_CopyExistingEntity: missing client entity 0.

The server doesn't shut down, and errors from entity logic or the like can continue to appear in the console until disconnect is run.

Issue Map

This map consisting of the entirety of Portal 1

To Reproduce

1. Start a multiplayer game on the above map
2. You get kicked to the menu, but console errors related to choreo scenes still appear

Operating System

Tested on Windows 10

[vrad-exe]

Still an issue, I would imagine this is related to having > 2048 edicts

[vrad-exe]

Still an issue