the game kept on bugging while open to LAN as i was playing with friends.what i mean is that other players would turn invisible after dying and in some cases blocks would be invisible. can you try and fix it please. thank you for reading
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duplicate of: MC-2306

Oliver, not a direct duplicate. The other issue is "invisible after teleporting", here "invisible after dying"
Already fixed.
Well the problem has come back in 1.4.6. Players in LAN worlds (especially for the host) sometimes while loading the world chests generate invisible. If another player dies, they become invisible. So far, for me this has never happened to those who join my LAN world. Seems to only happen to the host.
Without more information nobody can help you.
At least force a manual crash in Minecraft by pressing F3 + C for 10 seconds and attach the resulting crash report here.