wget ERROR: The certificate of ‘xyz’ is not trusted, has expired

I have a Debian 10 buster server, one of several identical hardware/software configs. I use a script that deploys them, they are all identical. However, one of them is throwing an error when using wget:

# wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.6.15.tar.xz
--2020-05-30 12:49:20--  https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.6.15.tar.xz
Resolving mirrors.edge.kernel.org (mirrors.edge.kernel.org)... 147.75.69.165, 2604:1380:1000:8100::1
Connecting to mirrors.edge.kernel.org (mirrors.edge.kernel.org)|147.75.69.165|:443... connected.
ERROR: The certificate of ‘mirrors.edge.kernel.org’ is not trusted.
ERROR: The certificate of ‘mirrors.edge.kernel.org’ has expired.

Things I've done:

• Checked that the SSL certificate is valid
• Confirmed the exact same command works on other servers
• Checked the system date, confirmed correct
• Checked resolv.conf, configuring for 8.8.8.8 8.8.4.4 identical to others
• Checked name resolution manually, working fine
• Reinstall apt-get install --reinstall ca-certificates
• Ran update-ca-certificates --fresh
• Ran c_rehash
• Used curl, it works fine without errors, shows correct SSL expiration

The problem seems to only be wget from what I can tell. I don't need a workaround. I need a solution so I have confidence this server is operating as it should.

I was able to solve my own problem using --no-dns-cache

# wget --no-dns-cache --debug https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.6.15.tar.xz

After this, it apparently updated whatever file was broken. It now works without the --no-dns-cache as well. So strange, but it seems stable.