Adobe Firefly Runway Gen-4.5 generated video cannot be downloaded

Hello,

I generated one video using Runway Gen-4.5 in Adobe Firefly
Generate Video.

The generation completed successfully and the result is still
visible in my Firefly Generation History.

Generation details:

Model: Runway Gen-4.5
Seed: 343519
Resolution: 720p
Aspect ratio: 16:9
Frame rate: 24 fps
Duration: 5 seconds

Firefly also displays Content Credentials identifying the origin as
Runway Gen-4.5 / RUNWAY AI, INC. and the content as AI-generated.

The problem is that using Download does not produce the generated
video file locally.

I have already confirmed that the result still exists in Generation
History, but there is no alternative download/export option there.

I am not requesting a new generation or replacement credits.

I only need to recover or download the existing generated video.

Could you please advise how I can retrieve the original generated
video associated with this existing history item?

Thank you.