Hi tb582,
I don't think it is a DNS issue, it looks more like you are having transient network connectivity issues, that also sometimes happens to affect the connection to your DNS server.
Here is an observation supporting this (a timeout between two IP addresses is pure connectivity - no DNS involved):
Next you see this (which could be a DNS issue or a general connectivity issue):
which I would consider a general connectivity issue when seen immediately after the first issue.
Here are some posts with my suggestions to troubleshoot network issues like these on Windows:
https://forum.rclone.org/t/backblaze-b2-api-version/33834/7
https://forum.rclone.org/t/backblaze-b2-api-version/33834/13