Downloading exported VHD from Azure fails.

I want to obtain a VHD of a virtual machine.
I followed this doc.
https://docs.microsoft.com/ja-jp/azure/virtual-machines/windows/download-vhd

I successfully got an SAS URL. Then, the download starts, but it fails in several minutes.

My network is not the cause because downloading fails even if I try it from my Azure Virtual Machine.

I also tried using wget, but it failed to resume download.