I use a Certificate Authority to issue certificates for various services.
However, on one of my devices, Chromium has started reporting that the Common Name is invalid
Viewing the certificate in dev tools (where the functionality has now been inconveniently hidden) the Common Name definitely matches the service being accessed.
This affects all services I've issued a cert for, but only in Chromium on that device.
The version is 58.0.3029.81
A version running 57.0.2987.98 is unaffected and reaches the sites fine.
Something has presumably changed in Chrome/Chromium