randomly players are getting this now, not all the time, but enough to be noticable. They can be doing anything it seems, walking, taking stuff out of a furnace etc, and get kicked with this (this is the message on the server console log)

removed "IP:port/steamid/playersname" disconnecting: Exception (cs:59653): NullReferenceException: Object reference not set to an instance of an object. ConstructionSkin.SpawnGibs (BuildingBlock parent) (at :0) BuildingBlock.SpawnGibs () (at :0) Client.OnEntityDestroy (Network.Message msg) (at :0) Client.OnNetworkMessage (Network.Message packet) (at :0) Facepunch.Network.Raknet.Client.HandleMessage () (at :0) Facepunch.Network.Raknet.Client.Cycle () (at :0) Client.Update () (at :0) UnityEngine.Debug:LogException(Exception)
Facepunch.Network.Raknet.Client:HandleMessage() Facepunch.Network.Raknet.Client:Cycle() Client:Update()

any one else having this? reinstalled the server, reinstalled the clients, cant seem to force it to make the error but several times a day it does this

Try changing map

i did, happens on both procedural and custom