Probably the way they check revocation or validity is slightly different
and likely something about soft fail (let you thru) vs hard fail (block you)
Also found an medium article on this
https://rambabusaravanan.medium.com...rome-and-edge-still-load-it-fine-3470de000528
Seem like it happen back in Aug
Giga’s one is a hard fail on safari. I can’t even accept the risk and proceed.
If it also happens so Aug, and for so many days, that makes it so much more worrying.
The medium article you shared mentioned chrome allows traffic through, so I tried using chrome too, but got hard blocked as well, with this error message:
”
www.giga.com.sg normally uses encryption to protect your information. When Chrome tried to connect to
www.giga.com.sg this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be
www.giga.com.sg or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Chrome stopped the connection before any data was exchanged.
You cannot visit
www.giga.com.sg right now because its certificate has been revoked. Network errors and attacks are usually temporary, so this page will probably work later.”