Downloading from Azure with Get-AzureStorageBlobContent - contents are garbled
This can happen when the content returned is not what you can read. It can be an image, zipped file etc. Please check the content is readable on the blog and is not in the compressed format or any non-readable format.
Update: Noticed from the comments from Gaurav that the issue is already resolved and it was indeed regarding content being compressed in GZIP format.