Bug or "as intended"

After /cast [mod:alt, target=focus] charge; charge; i return to target and i can't strike it with Auto Attack, recieving error that im too far away from target. if i return to focused target i strike it with auto attack. A bit annoying to retarget. And i can hit target with yellow attacks. Same things for intercept.

Regards,

Сатанклаусс.