[GAMEPLAY] Singed his fling doesn't work properly

On when you try to fling your enemy and quickly walk backwards your target is just going to get knocked up instead of thrown backwards as it supposed to. just had this in a normal game just some minutes ago and it also happend some time ago but I thought it was just lag but it seems like it is occuring in more of my games. So how this bug works is when you walk up to your target and fling him and quickly turn around the enemy will be knocked up instead of thrown backwards.

That was my bug report...

Not entirely sure if this has anything to do with ping/ms but hope I get a answer soon ^^