Shaco's passive overwrite's Stormrazor's passive. (Gameplay)

So Shaco's passive is (Backstab), "Shaco's basic attack critically strikes for extra damage when striking a unit from behind." That critical strike is 130%. Stormrazor's passive is (Storm's Edge), "Your next basic attack critically strikes for 160%." If you have the Stormrazor's passive ready and you back stab with Shaco you will only do 130% crit, but also consume the Stormrazor proc. So if you aim to back stab which instinctively as Shaco you do... with this item you will be losing 30% crit damage. It happens all the time. It will 100% happen, no matter what, guaranteed... if... it is in fact a back stab. Now the item does help with getting a crit when attacking any other side of the opponent, but that is a set back to Shaco player's because it demands change of tactic when you do or do not have the item, which should not be the case when you are losing 30% damage for no reason and consuming the proc of said item. I have issued this bug a few times and have yet to see any information on it. Feel free to ask me any questions about this bug. It is not skin specific or has any relation to your Q. It happens whenever you back stab an opponent every time available.