'Advanced Tracking and Fingerprinting Protection' Leaks DNS Queries to Apple

As the title says: “Advanced Tracking and Fingerprinting Protection Leaks DNS Queries to Apple”, see here for more information:

• Hacker News thread
• Cloudflare forum post
• AdGuard DNS post

This is relevant when:

• setting up home networks using split DNS
• you want to use DNS for content filtering or
• you prefer your DNS queries to stay private