I’m getting very slow download speeds when downloading my .ipa (and .aab) files from release-channels. I’m currently in Sweden getting ~13.5 kB/sec.
Saw this one: IPA download is very slow
Speedtest against servers in Stockholm and New York results in speeds well in excess of 100 Mbps.
It seems you are using Amazon S3. What are the settings there? Is there some option to swith to some high-availability?