You can disable IPv6 privacy extensions. The exact process depends on the operating system you use.

IPv6 not just allowing, but expecting multiple scoped addresses relieves this quite nicely.

The most common setup for this is that you have a static link-local address, and a static global address. And listening processes should listen to these static addresses.

Then you have a temporary global address, and outbound connections should use the youngest temporary global address (because temporary addresses don't disappear when they age out, they disappear when they age out AND no existing connection is still using them).

The net effect is that the address you leave in example.com's httpd logs is a temporary address that has no listening processes. And the address you use in dns, mdns, when connecting intentionally, etc is a static address.

I add a specific static ip where I care (dns resolver). The machines usually give themselves a few other routable ips I guess for fun? No idea why they don’t go away.