[Gameplay] Taunts extremely inconsistent

I've noticed that with all champs, taunts often won't force the target to attack until towards the middle or end of the taunt's duration. This has made playing taunt-based champions extremely frustrating -- especially when you taunt someone under your tower only to have them either not switch targets or just stand there.

Haven't found a way to consistently reproduce this bug. It seems to be that movement commands that are in being carried out take precedence over taunts, though.