When golden packs were introduced (https://magic.wizards.com/en/news/mtg-arena/introducing-mtg-arena-golden-packs) it was said that at least two of the cards would be from the current standard set. This does not appear to be the case as I have received at least two golden packs each with only one BRO card in them.

Not that I'm complaining about a pack with three Mythics, but I thought I'd raise the bug either way...