Viscous alternative shot disappearing sometimes when cast/shot under the blue lane bridge

[joaopedrov_vaccari]

Hello! I noticed this game that sometimes when I tried to shoot my right-click shot with Viscous, the shot would just disappear under the bridge on the blue lane, I'm not sure what could cause this.
On another note, in this game it also happened the Paige dragon getting stuck down there multiple times, but I think you are already aware of this one as it has been reported a few times from what I saw.

Match ID: 39956708

Viscous Shot Disappearing:


Paige Dragon Stuck:


Thanks!