A bug in Rengar and another autoatack-activated skill champions.

I don't really know if this is reported already, but due I was unable to find this specific topic in the boards I'll try to explain it as plain as I can:

I noticed this first while playing Rengar while specifically using Savagery[Q] skill. Sometimes, more commonly while jumping from a bush, then activating Battle Roar[W] mid-air and then Savagery[Q] Rengar would stand still not even autoatacking while beign under Monster aggression. After some tests, trying to see if was due lag or a client error, I noticed if a do a move command after activate Savagery[Q] Rengar starts to attack as normal as intended to be. As a note, I cannot remember something similar happened while activating Savagery[Q] without a previous activation of Battle Roar[W] but it actually happened if I activated Bola Strike[E] before. I can't remember if this supposed bug triggers with Thrill Of The Hunt[R].

I can add than I experimented similar but less common issues while playing Xin Zhao, when I approach to Jungle Monsters/Champions using Audacious Charge[E] and then inmediately activating Three Talon Strike[Q]. This never happened when activating Battle Cry[W] or Crescent Sweep[R] after Audacious Charge[E].

So, if we do a rough analysis, both skills are Autoatack-dependant skills chained to another previous skill.

Anyone experiencing this supposed but? Thank you in advance.