wall of flesh - may not be a bug

I know wall of flesh used to stop a lot of things. Now, things like kicks, bashes, tiger claws etc all bypass the wall of flesh. I know it used to stop invoker spells, including area effect ones. I could see the sense in changing that, if indeed it has changed. However, it seems strange that a axe wielder can hit me with a whirl but not with a melee strike. Examples I was on the receiving end of today included tiger claw, throw (I think, though I was translucent), mountain storm kick and double spin kick. I think it seems to allow all skills to hit. Seems odd that such physical attacks get past it. By design?