Zed Range Indicator Bug

The range indicator on zeds q seems to be a little bit bugged. I use quick-cast and i have the range indicators enabled. This has happend to me in the co-op and in a custom game, i don't know if it happens in the pvp too. I first make a shadow with the w and use my q and all works fine, but if i leave the shadow there till it disappears and then press q, a range indicator from where the shadow was will appear. This happens even if you keep q pressed till the shadow disappears, her range indicator will remain there. The bug triggers even after the shadow disappeard for 2 sec. The ultimate shadow is also afected, if you use w and wait until all the shadows disappear and try to use q then all 3 range indicators will appear.