A yellow 2×2 square at front right, plus the back-left corner. The front-left corner's yellow faces you.
Algorithms
R U2 R2 F R F' R U2 R'
9 moves
YOURS
Relations
Your algorithm backwards
R U2 R' F R' F' R2 U2 R'
solves OLL 37
That's why your scrambles are never the inverse of the algorithm: you'd be practising OLL 37 without knowing it. CubeDojo builds a random state with this case and checks it comes out.