We thought that in test and reported it. Its just one of them little sneaky things KI added.
Well, it is either a bug or it defies the restrictions of melee attacks. It makes no sense that Sato is able to execute a melee attack from a distance. Melee attacks are always executed against an opponent in an adjacent square. If that is the case, wouldn't all melee attacks be able to be used against any enemies from a distance? Either he should have some ranged attack to use after using Escape Artist or he should attack first before using Escape Artist. Definitely something that should be looked into.