Walker sends Whispers?

I use the L2Walker 1.78 on a L2JServer
Dunno why this happens, but sometimes other people get whispers with content like this:
FOLLOWTELEPORT:268467171,1,npc_268467171_Buy 23
This was when somebody whispered to me and I was buying some alacrity potions after her message, then she got this strange whisper.

I think it could be dangerous for Walker-Users, if this happens to often. In this case I simply said I have no clue what this message means. ^^'

Does anybody have the same problem?

uncheck "follow npc chat" in the party settings.

Ah, thx ^^
I've found it. Should work, I'll see. :)