Help forwarding PTR queries from Unbound to Knot DNS

[Grayhat]

> stub-zone:
>   name: "0.0.10.in-addr.arpa."
>   stub-addr: 10.0.0.14

did you try widening your zone to /24 and changing it to forward ?

An example

forward-zone:
  name: "10.in-addr.arpa."
  forward-addr: 10.0.0.14

HTH