Secure Connection shows Insecure

Server Version#: 1.20.0.3133
Player Version#: 4.34.4

Just enabled Secured Connections as Preferred. https works when going to the generic plex.tv url. But when I navigate directly to my internal hostname using https, I get the warning in my browser that the certificate is not valid. Expected? Work around?

Do you have a cert active on your PMS server / covering your home LAN?

I ask because browsers don’t like expecting one cert but getting another even though that cert might also be valid.