Is this why it doesn't seem like I do any damage to Yi as Ashe?

Seems like a bunch of baloney, if I can't have full damage vs a yi ult. Definitely understand how this could be missed but has anybody else experienced this in game?

Basically, from reading through this, this interactions work like so:

" Yi or Olaf or Morg's shield block the frost portion of the Ashe AA, which also blocks her crit damage. "

This would explain why it seemed like I couldn't damage Yi enough the other day when playing Ashe, even though I was fed up until Midgame.

I understand her slow not being applied, but not having any of your extra damage vs a Yi (even though all other ADC's could damage him same as any other time) makes Yi incredibly frustrating to play against.