Miss fortune unable tob e grabbed by blitz

hello so my girlfriend who is new to the game asked me if MF had something in her skills that can stop a blitz grab i explained to her that she hasent and asked if she had any items that could of caued it after checking her history i saw she had nothing like banshess veil ect and it wasent a spell shield like morganas E so it is a glitch was wondering if this is a known bug or not if anyone else has this let me know as it technicly grabbs her but it dosentdo the full grab only part of it her blitz just stops the animation withhis arms still out and starts walking towords her as if its pulling her to miss furtune instead of theother way around anyway any insight would be great

ps sorry for poor typeing