Syndras QE Combo is currently (gamebreakingly) bugged
Basically, when Syndra is in melee range her Q into E does NOT stun the enemie. "Normal" ranges are completely fine. In my opinion a game breaking bug - imagine late game Syndra getting jumped on by a Kha'Zix and not being able to stun him in order to escape.
EDIT: I know gamebreakingly is not quite a word, but I thought it's funny
Video: https://youtu.be/oWESD2rQ2Hs