[Gameplay] Jayce Q does not go off

This is a long term lasting bug, sometimes when you use Q in cannon form, it just does not explode, resulting in hitting NO ONE and also, it won't reveal a hidden part of map if you shoot it there. I don't actually recall if this happens with EQ combo, but it definitely happens in every game I play with Jayce when I use Q in Cannon stance. Does not matter which skin you use, happens with every skin (I own all). It is NOT only visual, because it does not hit enemies and won't reveal map on explode (that does not happen when bug occurs).

Please, fix this long term annoying bug, thanks.