Generative Fill only adds a partial black background, along with a bad hairline

Product and Feature: Adobe Firefly Generative Fill for Web

Version of the app: ?

Platform and OS version: Windows 11

Browser and version: Google Chrome 123.0.6312.86 (Official Build) (64-bit)

Basic steps to reproduce the problem: Open Adobe Firefly > Generative Fill > Upload image (Original.png) > Select Insert (on the left) > Click on Add (below the uploaded image) > Erase hair (Input.png) > Enter a prompt > Click on Generate

Prompt: "In a hyper-realistic scene of a corporate office, the man is engrossed in his work, his fingers dancing across the keyboard of his computer. Dressed sharply in formal attire, he navigates the digital landscape with precision, surrounded by the faint buzz of fluorescent lights. Through the window, the city skyline stretches under a muted sky, but his focus remains steadfast on the tasks at hand within the controlled confines of the office."

Expected result: Image that matches the prompt.

Actual result: A partial black background, along with a bad hairline. (Output.png)

I have tried multiple times, but the results are consistently similar. This is simply wasting my credits.