[IN-GAME BUG] Zed shadow doesn't reproduce abilities if very far away

I have no video of it but the bug is really simple. If you are far away from your shadow, W or Ult shadow, I am not sure how many units but the distance doesn't change in any occasion, i just don't know how many units, your shadow doesn't copy any of your abilities. This bug has denied me many kills and assists, or even my team's escape. In one occasion, i ulted a low target, he flashed away, i followd up with my W, hit him and R back. The deathmark didn't kill him but he stayed beside my shadow. I did E but the shadow didn't copy it while zed himself did that E. Or in a teamfight, i ult, i kill the half hp ADC, i R back. My team was kinda low and were chased by the rest of the enemy team, i E to slow them but my E didn't go off from the shadow. I could have saved my whole team with that one slow.

The bug is easy to reproduce. Just put a shadow in any spot and move away from it, at least one screen away. Your abilities will not be coppied. I know it's not about how long is the shadow out and that it doesn't matter if i do it almost before it dissappears. If i am close, i have done EQ with the shadow just before it vanishes and it copied them, but if i am far away, it doesn't copy them at all. It is very frustrating and it is gamechanging. Fix it pls.