Tailscale with Mullvad leaks your DNS

A user reported that Tailscale's integration with Mullvad VPN exit nodes is causing DNS leaks, where DNS queries are not being properly routed through the VPN and could expose browsing activity. The issue was reproducible by connecting to any Mullvad exit node through Tailscale and testing on browserleaks.com/dns, and was classified as a priority bug affecting usability.