Guys It happened to me too, a WHM was able to move from the South exit of the manor to the nord exit in about 4 or 5 sec, he walked like countinously teleporting his character, it wasn't lag he used a tool and we said to a GM.
Anyway I was playing with a friend with a PS4 and he recorded it, I'll ask him to put in on youtube.

the annoying things is that u are unable to know the name of the cheater.
Anyway I saw only 1 cheater in 50 campaign.
and he was a lalafel u.u