Perma slow after Blink

There is bug were you can get perma slowed after useing blink
It fixes itself by using blink again but if you on cooldown you perma slowed

Edit: i found a way to recrate it
you need be on wasd controls
cast spell im using spark
and then hit wall
and i found out that you can just use spark again to get rid of this slow but i think this can be deadly in few situations