Summary:
Using the the below API to download the files from Bitbucket Cloud we see that only the readable data or a portion of the file is downloaded and not the complete file.
This is not convenient when users need to download large files using automated APIs.

API: 

/2.0/repositories/{workspace}/{repo_slug}/downloads/{filename}

 Note: This endpoint returns the actual file contents and not the artifact's metadata.

Workaround:
1. Use the Downloads section of the Repository to download the individual files 
2. Use the below link to download all the files along with meta data

Link: 

https://bitbucket.org/<username>/<repo-name>/get/master.zip