[GAMEPLAY] Thresh attack speed is capped when attacking minions

Hello,

I just created a custom game to test thresh jungle (don't laugh, it will be OP soon), and I built attackspeed items until I reached 2.5 attacks per seconds.

When attacking turrets and champions, everything was normal (2.5 attacks per seconds). However, when attacking minions, the attack speed was much slower (something close to 1.2 attacks per second). I'm not entierly sure, but I think it also happens sometimes against champions.

My awesum jungle thresh playz should have been enough to carry me to challenger already, but alas I can't play him because of this :'( Could you please have a look ?

Thanks!

-- Pango

EDIT: spelling

EDIT2: After some more research, I figured out that the bug comes from the hurricane on thresh (it's passive does not impact towers).