Our Bard had the Feeblemind spell cast on him and failed his save. The battle ended and we gained a level. Feeblemind states that:
On a failed save, the creature's Intelligence and Charisma scores become 1.
While under the effects of Feeblemind, would an ASI be permanently wasted if taken in Intelligence or Charisma?
We use milestone leveling, and it happens immediately once the DM says we've leveled.