What is the issue?

When using Chrome (this issue doesn't present itself with Safari) on a mac, some url's resolve as IPv4 and IPv6 addresses but will then fail to load. If it resolves as IPv4 only then it will work fine. This is only an issue when using MagicDNS

Steps to reproduce

Enable Tailscale with MagicDNS and using Chrome on IPv4 only connection. Some sites do not work at all and some fail to load resources. In my instance I could not open tailscale.com Using chrome://net-internals/#dns test with tailscale.com produces: Resolved IP addresses of "tailscale.com": ["76.76.21.21"]. No alternative endpoints. when not using MagicDNS but with it enabled the same test shows as Resolved IP addresses of "tailscale.com": ["76.76.21.21","2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8","2600:9000:a51d:27c1:6748:d035:a989:fb3c"]. No alternative endpoints.

If you enable MagicDNS with an exit node however it works as IPv6 then works over the exit node.

Are there any recent changes that introduced the issue?

Worked fine for a while until upgrade of various versions of OS or maybe even Chrome.

OS

macOS 15.2

OS version

macOS 15.2

Tailscale version

1.78.1

Other software

Chrome 131.0.6778.205 (arm64)

Bug report

No response