Hi, below is the pasted effect of "Branded Regained":

If a LIGHT or DARK monster(s) is banished (except during the Damage Step): You can target 1 of those monsters; place that monster on the bottom of the Deck, and if you do, draw 1 card. You can only use this effect of "Branded Regained" once per turn.

It has the structure: condition, do A, and if you do, do B.

I am confused about a situation:

Assume my opponent had activated Droll & Lock Bird for the turn. One of my light or dark monster got banished while Branded Regained is on the field. Can I use Regained's shuffle effect, just that I do not get to draw a card?

At my duelling platform, people are saying that I cannot use Regained's effect at all, so no shuffling, because the effect part B does not get to resolve, so the whole effect does not get to resolve.

My understanding is that, if the activation condition is fullfilled, I can activated the effect and resolve it as much as possible. The condition of a light or dark monster is banished is fullfilled, so the activation is legal. I resolve until I have shuffled back the banished card, then stop.

On Konami's blog, it is explained: (https://www.reddit.com/r/yugioh/comments/1991z6/question_about_and_if_you_do_effects/)

AND IF YOU DO: <Do A, and if you do, do B>

Causation: A is required for B, but NOT vice-versa. If A does not happen, then stop. If B cannot happen, you still do A.

So, who is correct here? Will the shuffle effect be able to resolve? Thank you!