TLDR; When a client is in an IPv6 only environment it utilises the NAT64 and DNS64 in the network to connect to IPv4 only servers. However, when chrome tries to connect to an IPv4 literal (such as when an IPv4 address is directly written i…

RFC6555 Happy Eyeballs: Success with Dual-Stack Hosts https://datatracker.ietf.org/doc/html/rfc6555 RFC3484 gives IPv6 addresses higher precedence than IPv4 addresses. Because of this when IPv6 connectivity is impaired, IPv6-capable applic…