[ungamed]

If you can crash dns this way, please report it, its worthwhile fixing.

[Abishek_Muthian]

I'll try, Didn't have good experience with my earlier bug reports to Apple and now I'm completely out of that ecosystem. In fact I found this issue when my guests have iOS devices.

Anyways here's the regex blacklist I use in PiHole to prevent Apple's reverse DNS spam -

  ^(?:(?:\d+\.)*\d+(?:-in\.addr\.arpa\.)?)$