Reproduction steps
1) own 4 copies of all rare cards from alchemy bloomburrow, alchemy duskmourn, alchemy aetherdrift, alchemy khans of tarkir, alchemy end of eternities, except the rare lands from end of eternity(colloquially called checklands)
2) miss multiple copies of many normal rares from the main set of end of eternity, like for example pinnacle star cage and chart the stars
3) open an alchemy end of eternity booster
4)get a rare in the booster

Expected result:as the page detailing the booster contents says, this should result in the alchemy end of eternity rare being replaced by a end of eternity rare.

Actual result:20 gems are awarded, the card with the 20 gems image has the alchemy 2025 rare set symbol.