Sandstorm Ekko's Timewinder bug

When you activate your Q, the Timewinder goes to the direction you threw it but when it returns you can't see it. The minions just explode.

To check this :

1. Play Sandstorm Ekko.
2. Cast your Q
3. Almost for sure it will dissapear when you cast it.

This has happened almost every game since I bought Ekko.