The “ReceiveFogOfWarImages / IndexOutOfRangeException” disconnect is not caused by Limit Entities.
That stack trace is a client-side exception in BasePlayer.ReceiveFogOfWarImages (Hardcore fog-of-war RPC).
Limit Entities does not touch fog-of-war, PlayerState.fogImages, map markers, or any RPC payloads. It only tracks/limits server-side entities (build/deploy) and may deny placement at build time.
On the server, the fog-of-war RPC is sent using the saved PlayerState.fogImages list. If that list is corrupted (not exactly 16 entries), the client can throw IndexOutOfRange and disconnect when it processes ReceiveFogOfWarImages.
So the likely root cause is a corrupted fogImages list in the player’s saved state, or another plugin modifying PlayerState/map/fog-of-war data. Limit Entities is not in that path.
If you still think Limit Entities is involved, please provide a server-side stack trace pointing into LimitEntities.cs, or reproduce on a clean server with only Limit Entities and no other plugins.