That is incorrect.

The power stays countered until the conditions are met which end the Outwit.

There is even a passage in the PG covering this:
"If a countered power no longer shows on the dial, but then returns to the dial before the beginning of the Outwitting player’s next turn, the power is still countered."

Example:
dp023 E Black Cat
Team: Defenders
Range: 0
Points: 65
Keywords: Defenders, Heroes for Hire, Marvel Diva, Spider-Man Family

8 10 16 2

8 9 16 2

8 10 16 2

7 9 16 2

7 9 15 2

7 9 15 2

KO KO KO KO

(Improved) Keeping Up With the Spider: Improved Movement: Ignores Elevated Terrain, Ignores Hindering Terrain

Black Cat is on her top click. She has PC.
I Outwit her PC. I hit her for two.
She is now on click 3. She now has Outwit.
I hit her for one more.
She is now on click 4. PC is showing again. It is still countered.

Note that the same is true even if I hit her for 3 damage that first time.