DNS Issue with Backblaze Cloud Credentials

Having worked without issue for years, my backups have been failing due to not being able to resolve the Backblaze servers. The log message seems to give IPv6 addresses:

Error: 2024/09/02 18:18:08 Failed to create file system for “remote:”: failed to authorize account: failed to authenticate: Get “https://api.backblazeb2.com/b2api/v1/b2_authorize_account”: dial tcp: lookup api.backblazeb2.com on [2a0a:ef40:e4:6c01:684d:b130:79bd:498a]:53: read udp [2a0a:ef40:e4:6c01:3aea:a7ff:fea9:341b]:39782->[2a0a:ef40:e4:6c01:684d:b130:79bd:498a]:53: i/o timeout

I have only configured IPv4 addresses in the Network settings. If I change the nameservers and save them, the credentials will work, but when the next backup starts, I will have the same issue again.

Can anyone help me, I’m guessing it’s an internal issue, but really not sure why or how it’s started.