I was there, and was pretty surprised to see undie come without BD. I checked his effects list and it was there, but was not in fight. He did not get the effect, as if he did, he'd have a 4 hp healing/10sec, which he did not have.
Its ok... I am assuming it was an issue with lag, as i took BD about 5 seconds before the fight started. However i wanted to bring it to your attention incase there was a deeper issue.
I have since used it again and everything is back to normal.
Two minutes in heaven is better than one minute in heaven.