Persistent Ipv6 DNS on windows

[u/Flowweryyy]

i changed my modem dns from my home server to cloudflare dns to do some tests and i found out that i can just reset my ipv4 dns and it works fine again, but when i do ping tests with cmd, it insists in using the old ipv6 dns.

i already reseted the dns and changed it manually both in my modem and windows to cloudflare.

is it a problem from windows or am i doing something wrong?