When playing TFT Undead campaing, chapter Six: [A New Power in Lordaeron] where you play as both Dark Silvanas and Lord Garithos, shared economy stops working and human actions take UD money leaving the human economy in constant increase but unable to expend.
It doesn’t hapen right away, it triggers midgame.
Any expenses goes to the main player UD economy.
This issue began with the new 2.0 update
Greetings