I think it’s possible that power crafting badges miscalculate the amount of gold needed.
Here is me trying to craft 5 E5 badges for Fozzie during double badge drop event, with 12.13B gold in storage
Craft all button showed that I need 8.59B gold to craft all 5 badges:
However, I went on to craft each badges one by one instead:
As you can see, crafting those 5 badges only requires a total of around 4.1B gold
And when I finished crafting those 5 badges one by one, I ended up with 8.03B gold
I know that power crafting also generates gold, but I don’t think I ever get 4B gold from power crafting E5 badges.
If that so, I think it’s possible that power crafting miscalculates gold needed and by a significant amount