AI: Auto Pay Mana has problems with using Mana from Goldspan Dragon

Goldspan Dragon gives Treasure the Mana Ability to sacrifice for 2 Mana of any color

while having 1 such Treasure, i can't use auto pay to cast a creature that cost 1 Red and 1 Generic.

i also saw that auto pay sacrificed a Goldhound creature, while i had still normal treasure available.
AI should prefer normal treasure if able.