Unexpected status code and errors in logs

[RedSpid3r]

Playing about with the CerStream server in a docker container and seeing lots of these errors in the logs:

15:05:34.939 [error] Unexpected status code 301 fetching url https://oak.ct.letsencrypt.org/2019/ct/v1/get-sth:! Sleeping for a bit and trying again...,
15:05:35.921 [error] Unexpected status code 404 fetching url https://testflume.ct.letsencrypt.org/2019/ct/v1/get-sth:! Sleeping for a bit and trying again...
15:03:36.009 [error] Unexpected status code 503 fetching url https://ct.browser.360.cn/2021/ct/v1/get-sth:! Sleeping for a bit and trying again...
15:03:36.031 [error] Unexpected status code 503 fetching url https://ct.browser.360.cn/v1/2020/ct/v1/get-sth:! Sleeping for a bit and trying again...
15:03:36.054 [error] Unexpected status code 503 fetching url https://ct.browser.360.cn/v1/2022/ct/v1/get-sth:! Sleeping for a bit and trying again...
15:03:36.074 [error] Unexpected status code 503 fetching url https://ct.browser.360.cn/v1/2021/ct/v1/get-sth:! Sleeping for a bit and trying again...
15:07:13.956 [error] Error fetching url https://yeti2019.ct.digicert.com/log/ct/v1/get-sth: nxdomain! Sleeping for a bit and trying again...,
15:07:14.310 [error] Error fetching url https://nessie2019.ct.digicert.com/log/ct/v1/get-sth: nxdomain! Sleeping for a bit and trying again...

Not sure if this is something on the certstream side or an issue with the fluxsec/certstream-server container