Add Alva's Dialogue Option for "Buy or Sell Items" in the Hideout

After completing Act 3 for the second time, just as we start an endgame, Alva appears at the Ziggurat Refuge (Past), where we can trade gold for random items with her.

However, when we unlock a hideout, there is no NPC available to trade random items for gold. Alva does not have her "Buy or Sell Items" dialogue option in the hideout, and other NPCs only sell different types of items.

Am I missing something, or is there truly no way to buy random items for gold within the hideout? Currently, you need to teleport back to Ziggurat Refuge (Past) to trade with Alva, even though she is already present in your hideout.