The title pretty much says it all. I was extremely frustrated to learn in the middle of a match that an effect that DOES NOT cause damage is blocked by an effect that ONLY states it blocks the NEXT cause of DAMAGE.
Actually started using a deck with Dudu yesterday, but havent tried it on a shielded unit. It definitely seems like a bug, because copying a unit is definitely not damaging, its not like destroying or draining, which could be debated if the shield protects from it.
Until its fixed, i'll make sure i wont copy a shielded unit then.
I see it like you, that's why I pointed out, that for 10p it needs to be used carefully. I could imagine situations, where it could pay off (to counter cooldown units, for example), but I've also fallen into the trap once to put him on board forgetting that the card I copy needs to be in a specific row (and I placed Dudu -of course- in the wrong one). But then again, I'm known to be a derp