[Help] Unknown Packet Sender - DC

Hello, I've been having a problem with my server, which just went into Open Beta...

Sometimes, randomly, players will get DC'd (me included) and the gameserver will say:

Unhandled Game SR_MSG: 0x386f [data size: 0]
unknown packet sender detected!!! will be disconnected (char_name:Name of char here)

What can I do to fix this?

Maybe that character is bugged or doing something that makes the GS crash?

Like the trade bug maybe

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