you cannot cancel this, you could only modify the PM source. why would you want to cancel it anyways? It indicates a client/attacker sending invalid packets or spamming packets.
Timeout: Reason 5 seconds: Error on a normal MCPE packet 300 seconds: More then 5000 packets per tick from one address 600 seconds: Errors on external packet (like Query or RCON) https://pmmp.readthedocs.io/en/rtfd/faq/connecting/raklibthreadblocked.html
simple, if someone want to shoot themself in their own leg, they should be able to do it without killing 100 billion people to proof they really wanted to do it
I asked because I'm using TransferPacket for teleporting players between servers. It does not always work, and when someone teleports it will write these words.