@k3179402357gt, can you please give us some more details about your experience? Are you using Firefly beta's Generative fill module? What are the steps you are using to auto generate an image?
As one example, I started with this spacesuit character and clicked on “background” to remove the scene but keep the character:
Next, I typed in “walking trail” and clicked the Generate button:
Firefly provided four initial replacement backgrounds: