Possible issue for Hardcore servers?

I have been racking my brain trying to find the culprit of this error.  What happens is a player is playing fine for a few days, then he logs back in only to get these errors:
 

Quote

Primordial disconnecting: Exception (cs:130930): IndexOutOfRangeException: Index was outside the bounds of the array. BasePlayer.%2f432ae28de444bae52918894455d71a1260d0fe (BaseEntity+%757c3182a9e91503b262d89b8fcd3c9ffb1d21d8 %3db149c11149a37de83cc09e5a35741a3acd94da) (at <00000000000000000000000000000000>:0) BasePlayer.%06e5dd9d97a8285283af40b039a9299e70ef76e0 (BasePlayer %947b64fbeb9366563e9af517b6b098d8aae7c34f, System.UInt32 %28b4baff6009731534c7cf04af9cf2e53cf89f55, %68bbe2b5ef761edef45348d7aaa8de9c7b786f1f %3db149c11149a37de83cc09e5a35741a3acd94da) (at <00000000000000000000000000000000>:0) BaseEntity.%75793a1cf0d74564c7d0000f2471f0d970690285 (System.UInt32 %7432d615fd3d7bb25530281d6e3c955f66c38cf6, %68bbe2b5ef761edef45348d7aaa8de9c7b786f1f %51af613b0258a651fef5ce41cf742960f49ddd51) (at <00000000000000000000000000000000>:0) Client.%c7115bed6f2fc4e23d38be716247fd4c3c4cfcb6 (%68bbe2b5ef761edef45348d7aaa8de9c7b786f1f %4a64e2ab8e361835e1763395e109268ce4557818) (at <00000000000000000000000000000000>:0) Client.%269e089bd13271c548786f79ee0976351d554e99 (%68bbe2b5ef761edef45348d7aaa8de9c7b786f1f %4a64e2ab8e361835e1763395e109268ce4557818) (at <00000000000000000000000000000000>:0) %5b0254d3a7626868bc8529c15229ac755234e613.%3cd330e5b999ce6a5633ed9dec75130508e24fdd (%e32f3bbe7d723f441133b9228dc7a2fb74fa9d3a %4ef91c701b0310fc8cc5c3bedd8c58c7ec15bd90) (at <00000000000000000000000000000000>:0) %001b6b0b81cab7a6523b0abc3e40867c8c6b56dc.%79d34f87640b1d2c7a8e759a38069eab134cea2a () (at <00000000000000000000000000000000>:0) Client.Update () (at <00000000000000000000000000000000>:0) UnityEngine.Debug:LogException(Exception) BasePlayer:%06e5dd9d97a8285283af40b039a9299e70ef76e0(BasePlayer, UInt32, %68bbe2b5ef761edef45348d7aaa8de9c7b786f1f) BaseEntity:%75793a1cf0d74564c7d0000f2471f0d970690285(UInt32, %68bbe2b5ef761edef45348d7aaa8de9c7b786f1f) Client:%c7115bed6f2fc4e23d38be716247fd4c3c4cfcb6(%68bbe2b5ef761edef45348d7aaa8de9c7b786f1f) Client:%269e089bd13271c548786f79ee0976351d554e99(%68bbe2b5ef761edef45348d7aaa8de9c7b786f1f) %5b0254d3a7626868bc8529c15229ac755234e613:%3cd330e5b999ce6a5633ed9dec75130508e24fdd(%e32f3bbe7d723f441133b9228dc7a2fb74fa9d3a) %001b6b0b81cab7a6523b0abc3e40867c8c6b56dc:%79d34f87640b1d2c7a8e759a38069eab134cea2a() Client:Update()

If I kill the player in-game, and then they try to rejoin, the error shifts to this:

 

Quote

RPC Error in ReceiveFogOfWarImages: Index was outside the bounds of the array. at BasePlayer.%655e5d83be900064cb780124bc8d1adc64b7e230 (BaseEntity+%43881ca271bc2df20cb4d6bcd47e21366e52f671 %43c93bc914f3150d103554b3fb97a506b5fa7ec2) [0x00000] in <00000000000000000000000000000000>:0 at BasePlayer.%fbba0566ab7a0bd07c472a0faae9c57a63626088 (BasePlayer %41600dde11de3c72944dcefcfc30ede26cad2826, System.UInt32 %e9693808aa47da65b3f203352d5e33cea7cd7f08, %8a44066ca91924f75ac85f3b95c111b8a575da6a %43c93bc914f3150d103554b3fb97a506b5fa7ec2) [0x00000] in <00000000000000000000000000000000>:0 at BaseEntity.%57573d8b75eafe04855c32d611dc0dba0ad69f39 (System.UInt32 %d899a001fcabc4bf2943803b4e0392c0dc13bc61, %8a44066ca91924f75ac85f3b95c111b8a575da6a %6fb0a4ba7f6048403ff34c1573cc776f81f810fa) [0x00000] in <00000000000000000000000000000000>:0 at Client.%8dfe08af9b364388838609a7f8da634046f69dd5 (%8a44066ca91924f75ac85f3b95c111b8a575da6a %c1bd100d4b7932325694d913d6073b6d6cbcb66a) [0x00000] in <00000000000000000000000000000000>:0 at %947456ef1a0a467ca294b1d4004a13b8e256b623.%25c0db1e9c1d19949a2b808077b3e137f265847f (%6e62d84b8d7c1a0b0397aa4707683a0947dae5e0 %f513c48fbe7bb07ffe02d8a26b0b97a08f423351) [0x00000] in <00000000000000000000000000000000>:0 at %859aa2adea0f775ec132ef32475a000dd021b62d.%8426bdfb9ade8ad4bc5a6c97503424bfe50bcdd2 () [0x00000] in <00000000000000000000000000000000>:0 at Client.Update () [0x00000] in <00000000000000000000000000000000>:0

I removed the limit entities plugin, the server had a daily restart, and then the player could re-join the server again.

Am I right that Limit Entities is a possible culprit for this RPC error?

Thank you for your time.

Limit Entities has nothing to do with errors you posted. 

Changed Status from Pending to Not a Bug

The limit entities plugin is causing this error on hardcore servers. I found another server admin who has the same issues.

I left the plugin removed from my server for 4 months and never had the issue.

I just put the plugin back on this month, and players are getting this error again.

Something with your plugin combined with Facepunch Hardcore mode does something unusual.  

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.

I'm certain this is the only plugin that I add ore remove that causes the issue. Ever since facepunch hardcore mode came out, it started happening.  Once I removed your plugin, the problem went away.  4 months later, I tried to add it back, and it started happening again to players.  I know you stay strongly that you dont think it could cause it, but very few people run Facepunch hardcore more. I ran into another server admin who came to the same conclusion that this plugin was also causing it on his hardcore server and we worked together to find a fix.  Its a RARE bug on top of that, only about 1 out of 50 players affected even when I put this plugin on, so its very hard to reproduce by itself.  I Know in my gut the problem was gone for 4months while this plugun was removed, and a few days after adding it back on, the problem returned, and players complained they cant join the server.  Ive done enough troubleshooting to isolate it to this plugin + hardcore mode